EVALUATED PARAMETER REFERENCE

cosmo zoom gravity only 3d.

Browse the evaluated DIPL parameters for this pinned Arepo example. Values come from the bundled setup; a run using overrides can differ.

162 model parameters14 top-level groupsSource 351aa8111a32Explore 3D graph ↗Browse schemas ↗Try an override ↗

What this reference shows

Each entry gives the effective value, type, description, and relevant constraints. Open “Schema & provenance” for additional metadata and links to DIPL source files at the recorded lines.

PARAMETER GROUP

Analysis

2 parameters

analysis.subfind.linking_neighbors

linking neighbors

EFFECTIVE VALUE20

Minimum number of particles/cells retained in a Subfind group.

Try changing this parameter ↗

Type int64

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: analysis_settings, subfind_analysis_settings
Supplied by schema: subfind_analysis_settings
Validation condition: {.} > 0
Requires: build.analysis.subfind

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/analysis.dip:5
Declaration: linking_neighbors int
Modified at: profile.dip:119
Modification: linking_neighbors = 20

Notes

Author guidance (advisory; not enforced by these metadata fields):

analysis.subfind.opening_angle

opening angle

EFFECTIVE VALUE0.5

Subfind tree opening angle.

Try changing this parameter ↗

Type float64

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: analysis_settings, subfind_analysis_settings
Supplied by schema: subfind_analysis_settings
Validation condition: {.} > 0
Requires: build.analysis.subfind

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/analysis.dip:12
Declaration: opening_angle float
Modified at: profile.dip:120
Modification: opening_angle = 0.5

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Build

67 parameters

build.analysis.fof

fof

EFFECTIVE VALUEtrue

Compile the friends-of-friends halo finder.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:382
Declaration: fof bool = false
Modified at: profile.dip:30
Modification: fof = true

build.analysis.fof.primary_link_type_mask

primary link type mask

EFFECTIVE VALUE2

Particle-type bit mask used as FoF primary linking tracers.

Try changing this parameter ↗

Type int64

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Validation condition: {.} >= 0

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:387
Declaration: primary_link_type_mask int = 2
Modified at: profile.dip:31
Modification: primary_link_type_mask = 2

build.analysis.fof.secondary_link_type_mask

secondary link type mask

EFFECTIVE VALUE49

Particle-type bit mask attached to nearest FoF primary tracers.

Try changing this parameter ↗

Type int64

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Validation condition: {.} >= 0

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:393
Declaration: secondary_link_type_mask int = 0
Modified at: profile.dip:32
Modification: secondary_link_type_mask = 49

build.analysis.subfind

subfind

EFFECTIVE VALUEtrue

Compile the Subfind substructure finder; requires FoF.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Requires: build.analysis.fof

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:399
Declaration: subfind bool = false
Modified at: profile.dip:33
Modification: subfind = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.analysis.subfind.calculate_velocity_dispersion

calculate velocity dispersion

EFFECTIVE VALUEfalse

Calculate additional Subfind velocity-dispersion information.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:410
Declaration: calculate_velocity_dispersion bool = false

build.analysis.subfind.extended_properties

extended properties

EFFECTIVE VALUEfalse

Calculate extended Subfind angular-momentum and energy properties.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:415
Declaration: extended_properties bool = false

build.analysis.subfind.save_density_estimates

save density estimates

EFFECTIVE VALUEfalse

Save Subfind smoothing lengths, densities, and velocity dispersions.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:405
Declaration: save_density_estimates bool = false

build.boundaries.x_mode

x mode

EFFECTIVE VALUE0

X-boundary mode; zero leaves no REFLECTIVE_X compile option.

Try changing this parameter ↗

Type int64

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Allowed options: 0, 1, 2

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:8
Declaration: x_mode int = 0

build.boundaries.y_mode

y mode

EFFECTIVE VALUE0

Y-boundary mode; zero leaves no REFLECTIVE_Y compile option.

Try changing this parameter ↗

Type int64

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Allowed options: 0, 1, 2

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:18
Declaration: y_mode int = 0

build.boundaries.z_mode

z mode

EFFECTIVE VALUE0

Z-boundary mode; zero leaves no REFLECTIVE_Z compile option.

Try changing this parameter ↗

Type int64

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Allowed options: 0, 1, 2

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:24
Declaration: z_mode int = 0

build.diagnostics.debug

debug

EFFECTIVE VALUEtrue

Enable Arepo debugging facilities and core-dump support.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:452
Declaration: debug bool = false
Modified at: profile.dip:38
Modification: debug = true

build.geometry.one_dimensional

one dimensional

EFFECTIVE VALUEfalse

Restrict the Voronoi mesh and hydrodynamics to one dimension.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:31
Declaration: one_dimensional bool = false

build.geometry.spherical_one_dimensional

spherical one dimensional

EFFECTIVE VALUEfalse

Use one-dimensional spherical geometry.

Try changing this parameter ↗

Type bool

Scientific impact Uses the first coordinate as radius under spherical symmetry.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Uses the first coordinate as radius under spherical symmetry.
Requires: build.geometry.one_dimensional

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:41
Declaration: spherical_one_dimensional bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.geometry.static_mesh

static mesh

EFFECTIVE VALUEfalse

Use a static Voronoi mesh.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Performance impact: Disables domain decomposition by default; mesh-generating points have zero velocity.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:49
Declaration: static_mesh bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.geometry.two_dimensional

two dimensional

EFFECTIVE VALUEfalse

Restrict the Voronoi mesh and hydrodynamics to two dimensions.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:36
Declaration: two_dimensional bool = false

build.gravity.cell_center_evaluation

cell center evaluation

EFFECTIVE VALUEfalse

Evaluate cell gravity at geometric centres; requires hierarchical gravity.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Requires: build.gravity.hierarchical

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:122
Declaration: cell_center_evaluation bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.direct_summation

direct summation

EFFECTIVE VALUEtrue

Allow direct summation for small active particle sets.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Performance impact: Avoids tree-walk overhead for sufficiently small active particle sets.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:128
Declaration: direct_summation bool = false
Modified at: profile.dip:9
Modification: direct_summation = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.direct_summation.threshold

threshold

EFFECTIVE VALUE1024

Active-particle threshold below which direct gravity summation is used.

Try changing this parameter ↗

Type int64

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Validation condition: {.} > 0
Recommended range: Positive; Arepo's documented default is 3000 active particles.
Performance impact: Increasing the threshold selects direct summation for more active-particle sets.
Requires: build.gravity.direct_summation

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:135
Declaration: threshold int = 3000
Modified at: profile.dip:10
Modification: threshold = 1024

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.evaluate_potential

evaluate potential

EFFECTIVE VALUEtrue

Calculate gravitational potentials.

Try changing this parameter ↗

Type bool

Scientific impact Enables potential-energy diagnostics for global energy-conservation tests.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Enables potential-energy diagnostics for global energy-conservation tests.
Performance impact: Computes potential energy whenever global statistics are measured.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:221
Declaration: evaluate_potential bool = false
Modified at: profile.dip:11
Modification: evaluate_potential = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.hierarchical

hierarchical

EFFECTIVE VALUEtrue

Use hierarchical gravity time integration.

Try changing this parameter ↗

Type bool

Scientific impact Uses hierarchical splitting of gravitational time integration.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Uses hierarchical splitting of gravitational time integration.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:115
Declaration: hierarchical bool = false
Modified at: profile.dip:8
Modification: hierarchical = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.individual_softening_type_mask

individual softening type mask

EFFECTIVE VALUE60

Particle-type bit mask selecting individual gravity softening.

Try changing this parameter ↗

Type int64

Scientific impact Assigns selected particle types a softening based on mass relative to type 1; primarily useful for zoom simulations.

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Validation condition: {.} >= 0
Scientific impact: Assigns selected particle types a softening based on mass relative to type 1; primarily useful for zoom simulations.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:154
Declaration: individual_softening_type_mask int = 0
Modified at: profile.dip:13
Modification: individual_softening_type_mask = 60

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.multiple_node_softening

multiple node softening

EFFECTIVE VALUEtrue

Retain component-specific softenings when using softened tree nodes.

Try changing this parameter ↗

Type bool

Scientific impact Approximates component centres of mass separately when evaluating softened node-particle interactions.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Approximates component centres of mass separately when evaluating softened node-particle interactions.
Performance impact: Can avoid a substantial tree-walk penalty from opening softened nodes, but stores component masses per tree node.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:145
Declaration: multiple_node_softening bool = false
Modified at: profile.dip:12
Modification: multiple_node_softening = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.non_periodic

non periodic

EFFECTIVE VALUEfalse

Compile non-periodic gravity.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:216
Declaration: non_periodic bool = false

build.gravity.particle_mesh

particle mesh

EFFECTIVE VALUEtrue

Enable periodic particle-mesh gravity in the TreePM solver.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:163
Declaration: particle_mesh bool = false
Modified at: profile.dip:14
Modification: particle_mesh = true

build.gravity.particle_mesh.enlarge_high_resolution_region

enlarge high resolution region

EFFECTIVE VALUE1.1

Expansion factor for the TreePM high-resolution region.

Try changing this parameter ↗

Type float64

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Performance impact: A larger buffer reduces expensive high-resolution mesh-geometry recalculations for expanding particle sets.
Requires: build.gravity.particle_mesh.high_resolution_type_mask

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:193
Declaration: enlarge_high_resolution_region float = 0
Modified at: profile.dip:18
Modification: enlarge_high_resolution_region = 1.1

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.particle_mesh.grid_resolution

grid resolution

EFFECTIVE VALUE256

Particle-mesh cells per dimension; zero is disabled.

Try changing this parameter ↗

Type int64

Scientific impact Enables TreePM, using PM for long-range and the tree for short-range forces.

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Validation condition: {.} >= 0
Recommended range: At least 256 for TreePM accuracy; powers of two are fastest for FFTs.
Scientific impact: Enables TreePM, using PM for long-range and the tree for short-range forces.
Performance impact: Larger grids increase PM-force resolution, memory use, and FFT cost.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:166
Declaration: grid_resolution int = 0
Modified at: profile.dip:15
Modification: grid_resolution = 256

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.particle_mesh.high_resolution_grid_boost

high resolution grid boost

EFFECTIVE VALUE2

Resolution multiplier for a zoom TreePM grid.

Try changing this parameter ↗

Type int64

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Performance impact: Changes high-resolution FFT mesh size in proportion to PMGRID.
Requires: build.gravity.particle_mesh.high_resolution_type_mask

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:201
Declaration: high_resolution_grid_boost int = 0
Modified at: profile.dip:19
Modification: high_resolution_grid_boost = 2

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.particle_mesh.high_resolution_type_mask

high resolution type mask

EFFECTIVE VALUE2

Particle-type mask defining the TreePM high-resolution region.

Try changing this parameter ↗

Type int64

Scientific impact Adds a high-resolution Fourier mesh around the selected particle types for zoom simulations.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Adds a high-resolution Fourier mesh around the selected particle types for zoom simulations.
Requires: build.gravity.particle_mesh.grid_resolution

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:185
Declaration: high_resolution_type_mask int = 0
Modified at: profile.dip:17
Modification: high_resolution_type_mask = 2

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.particle_mesh.short_range_cutoff

short range cutoff

EFFECTIVE VALUE5.5

TreePM short-range cutoff in particle-mesh cell units.

Try changing this parameter ↗

Type float64

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Validation condition: {.} > 0
Rationale: 4.5 mesh cells is Arepo's documented default.
Performance impact: Larger cutoffs extend the tree calculation further from each particle.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:176
Declaration: short_range_cutoff float = 4.5
Modified at: profile.dip:16
Modification: short_range_cutoff = 5.5

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.particle_mesh.zoom_optimized

zoom optimized

EFFECTIVE VALUEtrue

Use the TreePM algorithm optimized for cosmological zoom simulations.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Performance impact: Uses a communication algorithm robust to clustered zoom data, but slower than the default for homogeneous periodic boxes.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:209
Declaration: zoom_optimized bool = false
Modified at: profile.dip:20
Modification: zoom_optimized = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.gravity.self_gravity

self gravity

EFFECTIVE VALUEtrue

Compile gravitational interactions between particles and cells.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:110
Declaration: self_gravity bool = false
Modified at: profile.dip:7
Modification: self_gravity = true

build.gravity.softening_types

softening types

EFFECTIVE VALUE6

Number of available gravitational-softening families.

Try changing this parameter ↗

Type int64

Scientific impact Defines the available gravity-softening families that particle types may share.

Validation {.} >= 2

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Validation condition: {.} >= 2
Rationale: Defaults to Arepo's NTYPES (six in this source tree) when NSOFTTYPES is omitted; must match the configured SofteningComovingTypeN entries.
Scientific impact: Defines the available gravity-softening families that particle types may share.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:229
Declaration: softening_types int = 6
Modified at: profile.dip:21
Modification: softening_types = 6

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.initial_conditions.generate_gas_from_dark_matter

generate gas from dark matter

EFFECTIVE VALUEfalse

Generate gas particles from dark-matter-only initial conditions.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:314
Declaration: generate_gas_from_dark_matter bool = false

build.io.cpu_csv

cpu csv

EFFECTIVE VALUEfalse

Write the supplementary cpu.csv performance log.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:308
Declaration: cpu_csv bool = false

build.io.hdf5

hdf5

EFFECTIVE VALUEtrue

Compile HDF5 snapshot and initial-condition support.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:274
Declaration: hdf5 bool = false
Modified at: profile.dip:28
Modification: hdf5 = true

build.io.input_double_precision

input double precision

EFFECTIVE VALUEfalse

Read initial conditions in double precision.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:288
Declaration: input_double_precision bool = false

build.io.output_coordinates_double

output coordinates double

EFFECTIVE VALUEfalse

Always write coordinates in double precision.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:293
Declaration: output_coordinates_double bool = false

build.io.output_double_precision

output double precision

EFFECTIVE VALUEfalse

Write snapshot fields in double precision.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:298
Declaration: output_double_precision bool = false

build.io.read_mass_as_density

read mass as density

EFFECTIVE VALUEfalse

Interpret IC Mass fields as densities.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:303
Declaration: read_mass_as_density bool = false

build.io.reduced_flush

reduced flush

EFFECTIVE VALUEfalse

Reduce log-file flush frequency.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Performance impact: Reduces filesystem flush activity by avoiding flushes at every synchronization point.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:281
Declaration: reduced_flush bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.mesh.adaptive_hydro_softening

adaptive hydro softening

EFFECTIVE VALUEfalse

Compile adaptive gas-cell gravitational softening.

Try changing this parameter ↗

Type bool

Scientific impact Varies hydro-cell softening with cell radius using the runtime adaptive-softening table.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Varies hydro-cell softening with cell radius using the runtime adaptive-softening table.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:328
Declaration: adaptive_hydro_softening bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.mesh.center_of_mass_drift

center of mass drift

EFFECTIVE VALUEfalse

Regularize mesh-generating-point drift from cell centres of mass.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:340
Declaration: center_of_mass_drift bool = false

build.mesh.drift_limited_by_sound_speed

drift limited by sound speed

EFFECTIVE VALUEfalse

Limit centre-of-mass regularization by local sound speed.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Requires: build.mesh.center_of_mass_drift

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:345
Declaration: drift_limited_by_sound_speed bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.mesh.face_angle_regularization

face angle regularization

EFFECTIVE VALUEfalse

Regularize mesh cells using their maximum face angle.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:335
Declaration: face_angle_regularization bool = false

build.mesh.no_refine_background_grid

no refine background grid

EFFECTIVE VALUEfalse

Exclude the background grid from refinement.

Try changing this parameter ↗

Type bool

Scientific impact Prevents derefinement of sufficiently large background cells in cosmological zoom simulations.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Prevents derefinement of sufficiently large background cells in cosmological zoom simulations.
Requires: build.mesh.refinement

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:359
Declaration: no_refine_background_grid bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.mesh.override_peanogrid_warning

override peanogrid warning

EFFECTIVE VALUEfalse

Allow configurations that exceed the Peano-grid warning threshold.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:367
Declaration: override_peanogrid_warning bool = false

build.mesh.refinement

refinement

EFFECTIVE VALUEfalse

Compile cell refinement and derefinement.

Try changing this parameter ↗

Type bool

Scientific impact Enables dynamic cell refinement and derefinement; the default target is gas-cell mass.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Enables dynamic cell refinement and derefinement; the default target is gas-cell mass.
Conflicts with: build.geometry.one_dimensional

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:320
Declaration: refinement bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.mesh.volume_refinement

volume refinement

EFFECTIVE VALUEfalse

Compile volume-limited mesh refinement.

Try changing this parameter ↗

Type bool

Scientific impact Enforces absolute cell-volume bounds and a maximum neighbouring-cell volume contrast.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Enforces absolute cell-volume bounds and a maximum neighbouring-cell volume contrast.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:352
Declaration: volume_refinement bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.numerics.riemann_hlld

riemann hlld

EFFECTIVE VALUEfalse

Use the HLLD Riemann solver for ideal MHD.

Try changing this parameter ↗

Type bool

Scientific impact Selects the HLLD approximate Riemann solver required for MHD.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Selects the HLLD approximate Riemann solver required for MHD.
Requires: build.physics.magnetohydrodynamics

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:373
Declaration: riemann_hlld bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.output.acceleration

acceleration

EFFECTIVE VALUEfalse

Write gravitational accelerations.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:436
Declaration: acceleration bool = false

build.output.center_of_mass

center of mass

EFFECTIVE VALUEfalse

Write gas-cell centres of mass.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:426
Declaration: center_of_mass bool = false

build.output.magnetic_field_gradient

magnetic field gradient

EFFECTIVE VALUEfalse

Write magnetic-field gradients.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:431
Declaration: magnetic_field_gradient bool = false

build.output.potential

potential

EFFECTIVE VALUEtrue

Write gravitational potentials.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:446
Declaration: potential bool = false
Modified at: profile.dip:36
Modification: potential = true

build.output.pressure_gradient

pressure gradient

EFFECTIVE VALUEfalse

Write pressure gradients.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:441
Declaration: pressure_gradient bool = false

build.output.process_schedule_exactly

process schedule exactly

EFFECTIVE VALUEtrue

Process output-list times before starting to improve timing accuracy.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:421
Declaration: process_schedule_exactly bool = false
Modified at: profile.dip:35
Modification: process_schedule_exactly = true

build.physics.adiabatic_index

adiabatic index

EFFECTIVE VALUE0

Compile-time gas adiabatic index; zero selects Arepo's default.

Try changing this parameter ↗

Type float64

Scientific impact Sets the equation-of-state adiabatic index for ideal hydrodynamics.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Rationale: A value of zero delegates to Arepo's ideal-hydrodynamics default of 5/3.
Scientific impact: Sets the equation-of-state adiabatic index for ideal hydrodynamics.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:101
Declaration: adiabatic_index float = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.physics.cooling

cooling

EFFECTIVE VALUEfalse

Compile radiative cooling and UV-background support.

Try changing this parameter ↗

Type bool

Scientific impact Enables primordial cooling physics and conversions to proper cgs quantities.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Enables primordial cooling physics and conversions to proper cgs quantities.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:57
Declaration: cooling bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.physics.jeans_cell_stability

jeans cell stability

EFFECTIVE VALUEfalse

Enforce the Jeans-stability temperature floor for gas cells.

Try changing this parameter ↗

Type bool

Scientific impact Imposes an adaptive temperature floor intended to keep the Jeans length resolved.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Imposes an adaptive temperature floor intended to keep the Jeans length resolved.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:71
Declaration: jeans_cell_stability bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.physics.magnetohydrodynamics

magnetohydrodynamics

EFFECTIVE VALUEfalse

Compile ideal magnetohydrodynamics.

Try changing this parameter ↗

Type bool

Scientific impact Evolves ideal MHD; a zero initial magnetic field remains zero under the ideal-MHD equations.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Evolves ideal MHD; a zero initial magnetic field remains zero under the ideal-MHD equations.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:78
Declaration: magnetohydrodynamics bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.physics.magnetohydrodynamics.powell_cleaning

powell cleaning

EFFECTIVE VALUEfalse

Use Powell eight-wave divergence-control terms for MHD.

Try changing this parameter ↗

Type bool

Scientific impact Adds Powell eight-wave divergence-control terms to the MHD equations.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Adds Powell eight-wave divergence-control terms to the MHD equations.
Requires: build.physics.magnetohydrodynamics

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:85
Declaration: powell_cleaning bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.physics.magnetohydrodynamics.powell_limit_timestep

powell limit timestep

EFFECTIVE VALUEfalse

Limit timesteps for Powell divergence-control stability.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Performance impact: Adds a timestep constraint required by Powell divergence control.
Requires: build.physics.magnetohydrodynamics

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:93
Declaration: powell_limit_timestep bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.physics.star_formation

star formation

EFFECTIVE VALUEfalse

Compile the Springel-Hernquist multiphase star-formation model.

Try changing this parameter ↗

Type bool

Scientific impact Turns eligible dense gas into collisionless star particles using the Springel-Hernquist (2003) model.

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Scientific impact: Turns eligible dense gas into collisionless star particles using the Springel-Hernquist (2003) model.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:64
Declaration: star_formation bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.precision.fftw_double

fftw double

EFFECTIVE VALUEtrue

Use double-precision FFTW transforms.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:263
Declaration: fftw_double bool = false
Modified at: profile.dip:26
Modification: fftw_double = true

build.precision.mode

mode

EFFECTIVE VALUE1

Arepo precision mode; zero leaves DOUBLEPRECISION unspecified.

Try changing this parameter ↗

Type int64

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Allowed options: 0, 1, 2, 3

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:252
Declaration: mode int = 0
Modified at: profile.dip:25
Modification: mode = 1

build.precision.neighbor_tree_double

neighbor tree double

EFFECTIVE VALUEfalse

Use double precision for neighbor-tree node extensions.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:268
Declaration: neighbor_tree_double bool = false

build.time.force_equal_timesteps

force equal timesteps

EFFECTIVE VALUEfalse

Force all particles/cells onto equal timesteps.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build
Performance impact: Can increase computational work by preventing individual adaptive timesteps.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:239
Declaration: force_equal_timesteps bool = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

build.time.tree_based_timesteps

tree based timesteps

EFFECTIVE VALUEtrue

Use the non-local, tree-based timestep criterion.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:config
Applied schemas: arepo_build
Supplied by schema: arepo_build

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/build.dip:246
Declaration: tree_based_timesteps bool = false
Modified at: profile.dip:23
Modification: tree_based_timesteps = true

PARAMETER GROUP

Code Units

3 parameters

code_units.length

length

EFFECTIVE VALUE3.086e21

One Arepo length unit (one kiloparsec).

Try changing this parameter ↗

Type float64Units cm

Schema & provenance

Model metadata

Tags: arepo:param
Rationale: Arepo interprets its native length unit in cm/h.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/cosmological_units.dip:5
Declaration: length float = 3.085678e21 cm

Notes

Author guidance (advisory; not enforced by these metadata fields):

code_units.mass

mass

EFFECTIVE VALUE1.989e43

One Arepo mass unit (10^10 solar masses).

Try changing this parameter ↗

Type float64Units g

Schema & provenance

Model metadata

Tags: arepo:param
Rationale: Arepo interprets its native mass unit in g/h.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/cosmological_units.dip:12
Declaration: mass float = 1.989e43 g

Notes

Author guidance (advisory; not enforced by these metadata fields):

code_units.velocity

velocity

EFFECTIVE VALUE1e5

One Arepo velocity unit (one kilometre per second).

Try changing this parameter ↗

Type float64Units cm*s-1

Schema & provenance

Model metadata

Tags: arepo:param
Rationale: Together with the length and mass bases, this determines Arepo's internal time unit.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/cosmological_units.dip:19
Declaration: velocity float = 1e5 cm/s

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Cosmology

7 parameters

cosmology.baryon_density

baryon density

EFFECTIVE VALUE0

Present-day baryon density parameter, OmegaBaryon.

Try changing this parameter ↗

Type float64

Scientific impact Defines the z=0 baryon density relative to critical density for comoving integration, halo/subhalo finding, and star formation.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: cosmology_settings
Supplied by schema: cosmology_settings
Scientific impact: Defines the z=0 baryon density relative to critical density for comoving integration, halo/subhalo finding, and star formation.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/cosmology.dip:12
Declaration: baryon_density float
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:46
Modification: baryon_density = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

cosmology.dark_energy_density

dark energy density

EFFECTIVE VALUE0.6911

Present-day dark-energy density parameter, OmegaLambda.

Try changing this parameter ↗

Type float64

Scientific impact Defines the z=0 vacuum-energy density relative to critical density for comoving integration and halo/subhalo finding.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: cosmology_settings
Supplied by schema: cosmology_settings
Expression: 1 - {?cosmology.matter_density}
Reads during evaluation: ?cosmology.matter_density
Rationale: Often derived from the remaining density budget of a flat cosmology.
Scientific impact: Defines the z=0 vacuum-energy density relative to critical density for comoving integration and halo/subhalo finding.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/cosmology.dip:33
Declaration: dark_energy_density float
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:50
Modification: dark_energy_density float = 0
Modified at: profile.dip:77
Modification: dark_energy_density float = ( 1 - {?cosmology.matter_density} )

Notes

Author guidance (advisory; not enforced by these metadata fields):

cosmology.dark_matter_density

dark matter density

EFFECTIVE VALUE0

Present-day non-baryonic matter density derived from total and baryon density.

Try changing this parameter ↗

Type float64

Scientific impact Represents the non-baryonic matter component implied by the total and baryon density parameters.

Schema & provenance

Model metadata

Applied schemas: cosmology_settings
Supplied by schema: cosmology_settings
Scientific impact: Represents the non-baryonic matter component implied by the total and baryon density parameters.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/cosmology.dip:41
Declaration: dark_matter_density float
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:51
Modification: dark_matter_density float = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

cosmology.final_redshift

final redshift

EFFECTIVE VALUE0

Final redshift from which the scale-factor end time is derived.

Try changing this parameter ↗

Type float64

Schema & provenance

Model metadata

Applied schemas: cosmology_settings
Supplied by schema: cosmology_settings
Reads during evaluation: ?simulation.time.final_redshift

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/cosmology.dip:30
Declaration: final_redshift float
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:49
Modification: final_redshift = {?simulation.time.final_redshift}
Modified at: profile.dip:76
Modification: final_redshift = {?simulation.time.final_redshift}

cosmology.hubble_parameter

hubble parameter

EFFECTIVE VALUE0.6774

Dimensionless Hubble parameter h, written to HubbleParam.

Try changing this parameter ↗

Type float64

Scientific impact Sets the z=0 Hubble constant in units of 100 km s^-1 Mpc^-1 for physics that converts to proper cgs units.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: cosmology_settings
Supplied by schema: cosmology_settings
Rationale: For gravity and adiabatic gas dynamics Arepo absorbs h into its code units; use 1.0 unless conversions to proper cgs units, such as radiative cooling, are required.
Scientific impact: Sets the z=0 Hubble constant in units of 100 km s^-1 Mpc^-1 for physics that converts to proper cgs units.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/cosmology.dip:19
Declaration: hubble_parameter float
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:47
Modification: hubble_parameter = 1
Modified at: profile.dip:74
Modification: hubble_parameter = 0.6774

Notes

Author guidance (advisory; not enforced by these metadata fields):

cosmology.initial_redshift

initial redshift

EFFECTIVE VALUE50

Initial redshift from which the scale-factor start time is derived.

Try changing this parameter ↗

Type float64

Schema & provenance

Model metadata

Applied schemas: cosmology_settings
Supplied by schema: cosmology_settings
Reads during evaluation: ?simulation.time.initial_redshift

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/cosmology.dip:27
Declaration: initial_redshift float
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:48
Modification: initial_redshift = {?simulation.time.initial_redshift}
Modified at: profile.dip:75
Modification: initial_redshift = {?simulation.time.initial_redshift}

cosmology.matter_density

matter density

EFFECTIVE VALUE0.3089

Present-day total matter density parameter, Omega0.

Try changing this parameter ↗

Type float64

Scientific impact Defines the z=0 matter density relative to critical density for comoving integration and halo/subhalo finding.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: cosmology_settings
Supplied by schema: cosmology_settings
Used by: cosmology.dark_energy_density
Scientific impact: Defines the z=0 matter density relative to critical density for comoving integration and halo/subhalo finding.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/cosmology.dip:5
Declaration: matter_density float
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:45
Modification: matter_density = 0
Modified at: profile.dip:73
Modification: matter_density = 0.3089

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Datasets

12 parameters

datasets.Masses_z0.data.mass

mass

EFFECTIVE VALUE

[1.059e14, 2.892e12, 1.244e12, 8.835e11, 6.487e11, 4.488e11, 3.772e11, 3.347e11, 2.555e11, 2.461e11, 2.018e11, 1.81e11, 1.773e11, 1.556e11, 1.282e11, 1.254e11, 1.16e11, 1.056e11, 9.995e10, 9.335e10, 8.486e10, 8.392e10, 8.297e10, 8.109e10, 7.826e10, 7.732e10, 7.732e10, 7.072e10, 6.789e10, 6.694e10, 6.412e10, 6.317e10, 6.129e10, 5.846e10, 5.469e10, 4.62e10, 4.526e10, 4.149e10, 4.149e10, 3.96e10, 3.772e10, 3.772e10, 3.772e10, 3.677e10, 3.583e10, 3.394e10, 3.394e10, 3.206e10, 3.112e10, 3.017e10, 3.017e10, 2.923e10, 2.923e10, 2.923e10, 2.923e10, 2.829e10, 2.734e10, 2.734e10, 2.64e10, 2.64e10, 2.546e10, 2.546e10, 2.357e10, 2.263e10, 2.169e10, 2.169e10, 2.169e10, 2.074e10, 2.074e10, 2.074e10, 1.98e10, 1.886e10, 1.886e10]

Try changing this parameter ↗

Type float64Shape 73

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:1
Declaration: mass float

datasets.Masses_z0.output_file

output file

EFFECTIVE VALUE"Masses_z0.txt"

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:dataset

Source history

Declared at: tables.dip:9
Declaration: output_file str = "Masses_z0.txt"

datasets.Masses_z0_5.data.mass

mass

EFFECTIVE VALUE

[7.072e13, 1.853e12, 1.429e12, 5.912e11, 5.167e11, 4.318e11, 3.828e11, 3.602e11, 3.149e11, 2.829e11, 2.555e11, 2.47e11, 1.914e11, 1.895e11, 1.867e11, 1.848e11, 1.848e11, 1.575e11, 1.556e11, 1.499e11, 1.395e11, 1.254e11, 1.235e11, 1.094e11, 1.084e11, 1.047e11, 9.052e10, 8.486e10, 8.109e10, 7.072e10, 6.317e10, 5.752e10, 5.374e10, 5.28e10, 5.28e10, 4.62e10, 4.62e10, 4.432e10, 4.337e10, 4.337e10, 4.149e10, 3.96e10, 3.866e10, 3.866e10, 3.772e10, 3.772e10, 3.677e10, 3.583e10, 3.583e10, 3.394e10, 3.206e10, 3.112e10, 3.112e10, 3.017e10, 2.923e10, 2.829e10, 2.829e10, 2.829e10, 2.829e10, 2.734e10, 2.64e10, 2.64e10, 2.64e10, 2.546e10, 2.451e10, 2.357e10, 2.357e10, 2.263e10, 2.263e10, 2.263e10, 2.074e10, 2.074e10, 2.074e10, 2.074e10, 2.074e10]

Try changing this parameter ↗

Type float64Shape 75

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:1
Declaration: mass float

datasets.Masses_z0_5.output_file

output file

EFFECTIVE VALUE"Masses_z0.5.txt"

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:dataset

Source history

Declared at: tables.dip:3
Declaration: output_file str = "Masses_z0.5.txt"

datasets.Masses_z1.data.mass

mass

EFFECTIVE VALUE

[4.112e13, 1.671e12, 1.476e12, 8.014e11, 5.912e11, 5.063e11, 4.102e11, 3.828e11, 2.989e11, 2.536e11, 2.395e11, 2.046e11, 2.037e11, 1.546e11, 1.405e11, 1.197e11, 1.009e11, 8.769e10, 8.109e10, 6.412e10, 6.317e10, 6.317e10, 6.223e10, 5.94e10, 5.846e10, 5.752e10, 5.092e10, 5.092e10, 5.092e10, 4.809e10, 4.714e10, 4.714e10, 4.714e10, 4.62e10, 4.526e10, 4.149e10, 4.149e10, 3.489e10, 3.489e10, 3.394e10, 3.3e10, 3.206e10, 3.206e10, 3.112e10, 3.112e10, 3.112e10, 3.112e10, 2.829e10, 2.64e10, 2.64e10, 2.64e10, 2.451e10, 2.357e10, 2.357e10, 2.263e10, 2.263e10, 2.263e10, 2.169e10, 2.169e10, 2.169e10, 2.074e10]

Try changing this parameter ↗

Type float64Shape 61

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:1
Declaration: mass float

datasets.Masses_z1.output_file

output file

EFFECTIVE VALUE"Masses_z1.txt"

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:dataset

Source history

Declared at: tables.dip:15
Declaration: output_file str = "Masses_z1.txt"

datasets.Masses_z2.data.mass

mass

EFFECTIVE VALUE

[1.468e13, 3.677e11, 1.678e11, 1.311e11, 1.216e11, 1.131e11, 9.995e10, 9.806e10, 8.392e10, 7.449e10, 7.166e10, 6.977e10, 6.883e10, 6.6e10, 4.149e10, 3.866e10, 3.583e10, 3.112e10, 2.923e10, 2.923e10, 2.829e10, 2.734e10, 1.98e10]

Try changing this parameter ↗

Type float64Shape 23

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:1
Declaration: mass float

datasets.Masses_z2.output_file

output file

EFFECTIVE VALUE"Masses_z2.txt"

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:dataset

Source history

Declared at: tables.dip:21
Declaration: output_file str = "Masses_z2.txt"

datasets.Masses_z3.data.mass

mass

EFFECTIVE VALUE[7.638e12, 3.112e11, 7.637e10, 7.26e10, 6.223e10, 5.752e10, 4.903e10, 2.829e10, 2.357e10, 2.169e10, 1.886e10]

Try changing this parameter ↗

Type float64Shape 11

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:1
Declaration: mass float

datasets.Masses_z3.output_file

output file

EFFECTIVE VALUE"Masses_z3.txt"

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:dataset

Source history

Declared at: tables.dip:27
Declaration: output_file str = "Masses_z3.txt"

datasets.Masses_z4.data.mass

mass

EFFECTIVE VALUE[2.896e12, 3.149e11, 4.149e10, 2.357e10]

Try changing this parameter ↗

Type float64Shape 4

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:1
Declaration: mass float

datasets.Masses_z4.output_file

output file

EFFECTIVE VALUE"Masses_z4.txt"

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:dataset

Source history

Declared at: tables.dip:33
Declaration: output_file str = "Masses_z4.txt"

PARAMETER GROUP

Experiment

1 parameters

experiment.setup.kind

kind

EFFECTIVE VALUE"cosmo_zoom_gravity_only_3d"

Selects the scientific setup branch represented by this DIPL environment.

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Applied schemas: experiment_settings, experiment_setup_selection
Supplied by schema: experiment_setup_selection
Allowed options: cosmological_star_formation, cosmological_gravity_only, mhd_shock_tube, alfven_wave_1d, cosmo_zoom_gravity_only_3d, current_sheet_2d, galaxy_merger_star_formation_3d, gresho_2d, interacting_blastwaves_1d, isolated_galaxy_collisionless_3d, noh_2d, noh_3d, polytrope_1d_spherical, shocktube_1d, wave_1d, yee_2d
URL: https://arepo-code.org/wp-content/userguide/simtypes.html

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/experiment.dip:6
Declaration: kind str
Modified at: profile.dip:4
Modification: kind = "cosmo_zoom_gravity_only_3d"

PARAMETER GROUP

Gravity

24 parameters

gravity.constant_internal

constant internal

EFFECTIVE VALUE0

Gravitational constant in the selected internal code-unit system.

Try changing this parameter ↗

Type float64

Scientific impact An explicit value defines a non-standard or natural unit system; it should not be set for cosmological integrations.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings
Supplied by schema: gravity_settings
Rationale: Zero asks Arepo to derive the physical value from the selected code units.
Scientific impact: An explicit value defines a non-standard or natural unit system; it should not be set for cosmological integrations.
Conflicts with: cosmological integration

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:123
Declaration: constant_internal float = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.domain_decomposition.active_fraction

active fraction

EFFECTIVE VALUE0.01

Active-particle fraction that triggers a domain decomposition.

Try changing this parameter ↗

Type float64

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_domain_decomposition
Supplied by schema: gravity_domain_decomposition
Validation condition: {.} >= 0
Performance impact: Larger values avoid domain-decomposition work at synchronization points with few active particles.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:66
Declaration: active_fraction float = 0.01
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:61
Modification: active_fraction = 0.01

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.domain_decomposition.multiple_domains

multiple domains

EFFECTIVE VALUE8

Number of simultaneous domain decompositions.

Try changing this parameter ↗

Type int64

Validation {.} >= 1

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_domain_decomposition
Supplied by schema: gravity_domain_decomposition
Validation condition: {.} >= 1
Performance impact: Too few domains can prevent simultaneous CPU and memory load balance; too many increase MPI communication across domain boundaries.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:48
Declaration: multiple_domains int = 1
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:59
Modification: multiple_domains = 2
Modified at: profile.dip:84
Modification: multiple_domains = 8

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.domain_decomposition.top_node_factor

top node factor

EFFECTIVE VALUE5

Top-level tree-node allocation factor.

Try changing this parameter ↗

Type float64

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_domain_decomposition
Supplied by schema: gravity_domain_decomposition
Validation condition: {.} > 0
Performance impact: Higher values enable finer Peano-Hilbert load cuts but increase the replicated top-level-tree memory on every MPI rank.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:57
Declaration: top_node_factor float = 2.5
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:60
Modification: top_node_factor = 4
Modified at: profile.dip:85
Modification: top_node_factor = 5

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.force_accuracy.integration

integration

EFFECTIVE VALUE0.012

Integration accuracy tolerance.

Try changing this parameter ↗

Type float64

Scientific impact Sets eta in the gravitational timestep criterion; collisionless cosmological timesteps scale approximately as eta^0.5.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_force_accuracy
Supplied by schema: gravity_force_accuracy
Scientific impact: Sets eta in the gravitational timestep criterion; collisionless cosmological timesteps scale approximately as eta^0.5.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:6
Declaration: integration float = 0.012
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:54
Modification: integration = 0.1
Modified at: profile.dip:80
Modification: integration = 0.012

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.force_accuracy.opening_angle

opening angle

EFFECTIVE VALUE0.4

Tree opening angle.

Try changing this parameter ↗

Type float64

Scientific impact Controls the initial Barnes-Hut force estimate and all tree forces when the geometric opening criterion is selected.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_force_accuracy
Supplied by schema: gravity_force_accuracy
Scientific impact: Controls the initial Barnes-Hut force estimate and all tree forces when the geometric opening criterion is selected.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:14
Declaration: opening_angle float = 0.7
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:55
Modification: opening_angle = 0.1
Modified at: profile.dip:81
Modification: opening_angle = 0.4

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.force_accuracy.opening_criterion

opening criterion

EFFECTIVE VALUE1

Tree opening-criterion selector.

Try changing this parameter ↗

Type int64

Scientific impact Selects relative force-error control (1) or the geometric Barnes-Hut criterion (0).

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_force_accuracy
Supplied by schema: gravity_force_accuracy
Allowed options: 0, 1
Recommended range: 1 (relative opening criterion), which Arepo normally recommends.
Scientific impact: Selects relative force-error control (1) or the geometric Barnes-Hut criterion (0).

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:31
Declaration: opening_criterion int = 1
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:57
Modification: opening_criterion = 1

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.force_accuracy.relative_force

relative force

EFFECTIVE VALUE2.5e-3

Relative force-error tolerance.

Try changing this parameter ↗

Type float64

Scientific impact Controls tree-force accuracy when using Arepo's relative opening criterion.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_force_accuracy
Supplied by schema: gravity_force_accuracy
Scientific impact: Controls tree-force accuracy when using Arepo's relative opening criterion.
Requires: gravity.force_accuracy.opening_criterion=1

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:22
Declaration: relative_force float = 0.0025
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:56
Modification: relative_force = 0.1
Modified at: profile.dip:82
Modification: relative_force = 0.0025

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.hydro.gas_softening_factor

gas softening factor

EFFECTIVE VALUE2.8

Gas-cell softening relative to the assigned base softening.

Try changing this parameter ↗

Type float64

Scientific impact Adaptive gas-cell softening is selected from a logarithmically spaced table after scaling the cell radius by this factor.

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_hydro_softening
Supplied by schema: gravity_hydro_softening
Validation condition: {.} > 0
Scientific impact: Adaptive gas-cell softening is selected from a logarithmically spaced table after scaling the cell radius by this factor.
Requires: build.mesh.adaptive_hydro_softening

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:79
Declaration: gas_softening_factor float = 1
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:63
Modification: gas_softening_factor = 0.01
Modified at: profile.dip:113
Modification: gas_softening_factor = 2.8

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.hydro.minimum_comoving

minimum comoving

EFFECTIVE VALUE0

Minimum comoving adaptive gas softening.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact Sets the smallest entry in the adaptive gas-softening table.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_hydro_softening
Supplied by schema: gravity_hydro_softening
Scientific impact: Sets the smallest entry in the adaptive gas-softening table.
Requires: build.mesh.adaptive_hydro_softening

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:88
Declaration: minimum_comoving float = 0 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.hydro.spacing

spacing

EFFECTIVE VALUE1

Geometric spacing between adaptive gas softening levels.

Try changing this parameter ↗

Type float64

Scientific impact Sets the spacing of the logarithmic adaptive gas-softening table.

Validation {.} >= 1

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: gravity_settings, gravity_hydro_softening
Supplied by schema: gravity_hydro_softening
Validation condition: {.} >= 1
Recommended range: At least 1; values define the geometric ratio between adjacent adaptive softening levels.
Scientific impact: Sets the spacing of the logarithmic adaptive gas-softening table.
Requires: build.mesh.adaptive_hydro_softening

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:96
Declaration: spacing float = 1

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.softenings.comoving[0].length

length

EFFECTIVE VALUE5

Gravity softening length in Arepo code-length units; the schema default is overridden by each setup.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Applied schemas: gravity_settings, gravity_softening_length
Supplied by schema: gravity_softening_length
Validation condition: {.} > 0 arepo_length
Scientific impact: A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/standard_softenings.dip:6
Modification: length = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Modification: length float = 0.1 arepo_length
Modified at: profile.dip:88
Modification: length = 5 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.softenings.comoving[1].length

length

EFFECTIVE VALUE5

Gravity softening length in Arepo code-length units; the schema default is overridden by each setup.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Applied schemas: gravity_settings, gravity_softening_length
Supplied by schema: gravity_softening_length
Validation condition: {.} > 0 arepo_length
Scientific impact: A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/standard_softenings.dip:8
Modification: length = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Modification: length float = 0.1 arepo_length
Modified at: profile.dip:90
Modification: length = 5 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.softenings.comoving[2].length

length

EFFECTIVE VALUE40

Gravity softening length in Arepo code-length units; the schema default is overridden by each setup.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Applied schemas: gravity_settings, gravity_softening_length
Supplied by schema: gravity_softening_length
Validation condition: {.} > 0 arepo_length
Scientific impact: A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/standard_softenings.dip:10
Modification: length = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Modification: length float = 0.1 arepo_length
Modified at: profile.dip:92
Modification: length = 40 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.softenings.comoving[3].length

length

EFFECTIVE VALUE125

Gravity softening length in Arepo code-length units; the schema default is overridden by each setup.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Applied schemas: gravity_settings, gravity_softening_length
Supplied by schema: gravity_softening_length
Validation condition: {.} > 0 arepo_length
Scientific impact: A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/standard_softenings.dip:12
Modification: length = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Modification: length float = 0.1 arepo_length
Modified at: profile.dip:94
Modification: length = 125 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.softenings.comoving[4].length

length

EFFECTIVE VALUE125

Gravity softening length in Arepo code-length units; the schema default is overridden by each setup.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Applied schemas: gravity_settings, gravity_softening_length
Supplied by schema: gravity_softening_length
Validation condition: {.} > 0 arepo_length
Scientific impact: A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/standard_softenings.dip:14
Modification: length = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Modification: length float = 0.1 arepo_length
Modified at: profile.dip:96
Modification: length = 125 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.softenings.comoving[5].length

length

EFFECTIVE VALUE125

Gravity softening length in Arepo code-length units; the schema default is overridden by each setup.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Applied schemas: gravity_settings, gravity_softening_length
Supplied by schema: gravity_softening_length
Validation condition: {.} > 0 arepo_length
Scientific impact: A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/standard_softenings.dip:16
Modification: length = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Modification: length float = 0.1 arepo_length
Modified at: profile.dip:98
Modification: length = 125 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.softenings.particle_type_map

particle type map

EFFECTIVE VALUE[0, 1, 2, 3, 4, 5]

Try changing this parameter ↗

Type int32Shape 6

Schema & provenance

Model metadata

Applied schemas: gravity_settings

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/standard_softenings.dip:30
Declaration: particle_type_map int[6] = [0,0,0,0,0,0]
Modified at: profile.dip:111
Modification: particle_type_map = [0,1,2,3,4,5]

gravity.softenings.physical_maximum[0].length

length

EFFECTIVE VALUE2.5

Gravity softening length in Arepo code-length units; the schema default is overridden by each setup.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Applied schemas: gravity_settings, gravity_softening_length
Supplied by schema: gravity_softening_length
Validation condition: {.} > 0 arepo_length
Scientific impact: A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/standard_softenings.dip:19
Modification: length = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Modification: length float = 0.1 arepo_length
Modified at: profile.dip:100
Modification: length = 2.5 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.softenings.physical_maximum[1].length

length

EFFECTIVE VALUE2.5

Gravity softening length in Arepo code-length units; the schema default is overridden by each setup.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Applied schemas: gravity_settings, gravity_softening_length
Supplied by schema: gravity_softening_length
Validation condition: {.} > 0 arepo_length
Scientific impact: A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/standard_softenings.dip:21
Modification: length = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Modification: length float = 0.1 arepo_length
Modified at: profile.dip:102
Modification: length = 2.5 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.softenings.physical_maximum[2].length

length

EFFECTIVE VALUE20

Gravity softening length in Arepo code-length units; the schema default is overridden by each setup.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Applied schemas: gravity_settings, gravity_softening_length
Supplied by schema: gravity_softening_length
Validation condition: {.} > 0 arepo_length
Scientific impact: A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/standard_softenings.dip:23
Modification: length = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Modification: length float = 0.1 arepo_length
Modified at: profile.dip:104
Modification: length = 20 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.softenings.physical_maximum[3].length

length

EFFECTIVE VALUE125

Gravity softening length in Arepo code-length units; the schema default is overridden by each setup.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Applied schemas: gravity_settings, gravity_softening_length
Supplied by schema: gravity_softening_length
Validation condition: {.} > 0 arepo_length
Scientific impact: A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/standard_softenings.dip:25
Modification: length = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Modification: length float = 0.1 arepo_length
Modified at: profile.dip:106
Modification: length = 125 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.softenings.physical_maximum[4].length

length

EFFECTIVE VALUE125

Gravity softening length in Arepo code-length units; the schema default is overridden by each setup.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Applied schemas: gravity_settings, gravity_softening_length
Supplied by schema: gravity_softening_length
Validation condition: {.} > 0 arepo_length
Scientific impact: A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/standard_softenings.dip:27
Modification: length = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Modification: length float = 0.1 arepo_length
Modified at: profile.dip:108
Modification: length = 125 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

gravity.softenings.physical_maximum[5].length

length

EFFECTIVE VALUE125

Gravity softening length in Arepo code-length units; the schema default is overridden by each setup.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Applied schemas: gravity_settings, gravity_softening_length
Supplied by schema: gravity_softening_length
Validation condition: {.} > 0 arepo_length
Scientific impact: A softening family may be shared by multiple particle types; its comoving and maximum physical values control short-range gravitational resolution.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/standard_softenings.dip:29
Modification: length = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/gravity.dip:111
Modification: length float = 0.1 arepo_length
Modified at: profile.dip:110
Modification: length = 125 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Hydrodynamics

9 parameters

hydrodynamics.courant_factor

courant factor

EFFECTIVE VALUE0.3

Courant-Friedrichs-Lewy timestep factor.

Try changing this parameter ↗

Type float64

Scientific impact Multiplies the cell-wise CFL condition and therefore directly limits hydrodynamical timesteps.

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Validation condition: {.} >= 0
Scientific impact: Multiplies the cell-wise CFL condition and therefore directly limits hydrodynamical timesteps.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/hydrodynamics.dip:6
Declaration: courant_factor float = 0.3
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:65
Modification: courant_factor = 0.3

Notes

Author guidance (advisory; not enforced by these metadata fields):

hydrodynamics.initial_gas_temperature

initial gas temperature

EFFECTIVE VALUE244.8

Initial gas temperature used where initial conditions lack it.

Try changing this parameter ↗

Type float64Units K

Scientific impact Applied only when positive and when the IC gas temperature is zero; the assumed ionization state changes above 10^4 K.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Scientific impact: Applied only when positive and when the IC gas temperature is zero; the assumed ionization state changes above 10^4 K.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/hydrodynamics.dip:14
Declaration: initial_gas_temperature float = 0 K
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:66
Modification: initial_gas_temperature = 0 K
Modified at: profile.dip:69
Modification: initial_gas_temperature = 244.8095 K

Notes

Author guidance (advisory; not enforced by these metadata fields):

hydrodynamics.internal_energy_density_limit

internal energy density limit

EFFECTIVE VALUE0

Density threshold for an internal-energy limit.

Try changing this parameter ↗

Type float64Units arepo_density

Scientific impact Activates the associated internal-energy floor below this density threshold.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Scientific impact: Activates the associated internal-energy floor below this density threshold.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/hydrodynamics.dip:35
Declaration: internal_energy_density_limit float = 0 arepo_density
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:69
Modification: internal_energy_density_limit = 0 arepo_density

Notes

Author guidance (advisory; not enforced by these metadata fields):

hydrodynamics.internal_energy_floor

internal energy floor

EFFECTIVE VALUE0

Internal-energy floor applied below the configured density threshold.

Try changing this parameter ↗

Type float64Units arepo_specific_energy

Scientific impact Prevents gas below the configured density threshold from cooling below this internal energy.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Scientific impact: Prevents gas below the configured density threshold from cooling below this internal energy.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/hydrodynamics.dip:44
Declaration: internal_energy_floor float = 0 arepo_specific_energy
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:70
Modification: internal_energy_floor = 0 arepo_specific_energy

Notes

Author guidance (advisory; not enforced by these metadata fields):

hydrodynamics.maximum_neighbor_deviation

maximum neighbor deviation

EFFECTIVE VALUE1

Permitted deviation from the desired neighbor count.

Try changing this parameter ↗

Type int64

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Validation condition: {.} >= 0
Performance impact: A larger tolerance reduces iterations required to determine the correct initial neighbour radius.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/hydrodynamics.dip:68
Declaration: maximum_neighbor_deviation int = 4
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:73
Modification: maximum_neighbor_deviation = 2
Modified at: profile.dip:71
Modification: maximum_neighbor_deviation = 1

Notes

Author guidance (advisory; not enforced by these metadata fields):

hydrodynamics.minimum_gas_temperature

minimum gas temperature

EFFECTIVE VALUE5

Temperature floor applied to gas.

Try changing this parameter ↗

Type float64Units K

Scientific impact Sets a thermodynamic floor for cooling physics.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Scientific impact: Sets a thermodynamic floor for cooling physics.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/hydrodynamics.dip:21
Declaration: minimum_gas_temperature float = 0 K
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:67
Modification: minimum_gas_temperature = 0 K
Modified at: profile.dip:70
Modification: minimum_gas_temperature = 5 K

Notes

Author guidance (advisory; not enforced by these metadata fields):

hydrodynamics.minimum_specific_energy

minimum specific energy

EFFECTIVE VALUE0

Minimum specific internal energy.

Try changing this parameter ↗

Type float64Units arepo_specific_energy

Scientific impact Provides a global lower bound on the gas specific internal energy.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Scientific impact: Provides a global lower bound on the gas specific internal energy.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/hydrodynamics.dip:53
Declaration: minimum_specific_energy float = 0 arepo_specific_energy
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:71
Modification: minimum_specific_energy = 0 arepo_specific_energy

Notes

Author guidance (advisory; not enforced by these metadata fields):

hydrodynamics.minimum_startup_density

minimum startup density

EFFECTIVE VALUE0

Minimum density imposed while starting the run.

Try changing this parameter ↗

Type float64Units arepo_density

Scientific impact All gas cells below this density immediately after IC loading are raised to this value.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Scientific impact: All gas cells below this density immediately after IC loading are raised to this value.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/hydrodynamics.dip:28
Declaration: minimum_startup_density float = 0 arepo_density
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:68
Modification: minimum_startup_density = 0 arepo_density

Notes

Author guidance (advisory; not enforced by these metadata fields):

hydrodynamics.target_neighbors

target neighbors

EFFECTIVE VALUE64

Desired hydrodynamic neighbor count.

Try changing this parameter ↗

Type int64

Scientific impact Sets the target number of nearest neighbours used for the initial gas-cell density/size estimate.

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: hydrodynamics_settings
Supplied by schema: hydrodynamics_settings
Validation condition: {.} > 0
Scientific impact: Sets the target number of nearest neighbours used for the initial gas-cell density/size estimate.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/hydrodynamics.dip:60
Declaration: target_neighbors int = 64
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:72
Modification: target_neighbors = 64

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Input

2 parameters

input.initial_conditions.format

format

EFFECTIVE VALUE1

Serialization format used to read the initial conditions.

Try changing this parameter ↗

Type int64

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: input_settings, initial_conditions_settings
Supplied by schema: initial_conditions_settings
Allowed options: 1, 2, 3
Recommended range: 3 (HDF5), unless a legacy binary format is specifically required.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/input.dip:12
Declaration: format int
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:6
Modification: format = 3
Modified at: profile.dip:42
Modification: format = 1

Notes

Author guidance (advisory; not enforced by these metadata fields):

input.initial_conditions.path

path

EFFECTIVE VALUE"./ics"

Initial-condition file path, without an automatically appended format suffix.

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: input_settings, initial_conditions_settings
Supplied by schema: initial_conditions_settings
Rationale: For multi-file ICs specify the basename without the trailing file number; for HDF5 omit the .hdf5 suffix because Arepo appends it.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/input.dip:5
Declaration: path str
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:5
Modification: path = "./IC"
Modified at: profile.dip:41
Modification: path = "./ics"

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Mesh

7 parameters

mesh.refinement.derefinement_criterion

derefinement criterion

EFFECTIVE VALUE1

Arepo derefinement-criterion selector.

Try changing this parameter ↗

Type int64

Scientific impact Selects the algorithm governing when gas cells are derefined.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_refinement
Supplied by schema: mesh_refinement
Scientific impact: Selects the algorithm governing when gas cells are derefined.
Requires: build.mesh.refinement

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/mesh.dip:64
Declaration: derefinement_criterion int = 1

Notes

Author guidance (advisory; not enforced by these metadata fields):

mesh.refinement.reference_gas_mass

reference gas mass

EFFECTIVE VALUE0

Reference gas-cell mass for refinement.

Try changing this parameter ↗

Type float64Units arepo_mass

Scientific impact Defines the mass scale around which the default refinement and derefinement maintain gas-cell resolution.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_refinement
Supplied by schema: mesh_refinement
Scientific impact: Defines the mass scale around which the default refinement and derefinement maintain gas-cell resolution.
Requires: build.mesh.refinement

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/mesh.dip:38
Declaration: reference_gas_mass float = 0 arepo_mass

Notes

Author guidance (advisory; not enforced by these metadata fields):

mesh.refinement.refinement_criterion

refinement criterion

EFFECTIVE VALUE1

Arepo refinement-criterion selector.

Try changing this parameter ↗

Type int64

Scientific impact Selects the algorithm governing when gas cells are refined.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_refinement
Supplied by schema: mesh_refinement
Scientific impact: Selects the algorithm governing when gas cells are refined.
Requires: build.mesh.refinement

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/mesh.dip:55
Declaration: refinement_criterion int = 1

Notes

Author guidance (advisory; not enforced by these metadata fields):

mesh.refinement.target_gas_mass_factor

target gas mass factor

EFFECTIVE VALUE1

Target gas-mass multiplier for refinement.

Try changing this parameter ↗

Type float64

Scientific impact Scales the reference gas-cell mass used by the refinement target.

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_refinement
Supplied by schema: mesh_refinement
Validation condition: {.} > 0
Scientific impact: Scales the reference gas-cell mass used by the refinement target.
Requires: build.mesh.refinement

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/mesh.dip:46
Declaration: target_gas_mass_factor float = 1

Notes

Author guidance (advisory; not enforced by these metadata fields):

mesh.regularization.maximum_face_angle_factor

maximum face angle factor

EFFECTIVE VALUE2.25

Maximum-face-angle roundness threshold.

Try changing this parameter ↗

Type float64

Scientific impact Elongated cells above the face-angle thresholds are not refined and their mesh generators are moved away from pure Lagrangian motion.

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_regularization
Supplied by schema: mesh_regularization
Validation condition: {.} > 0
Scientific impact: Elongated cells above the face-angle thresholds are not refined and their mesh generators are moved away from pure Lagrangian motion.
Requires: build.mesh.face_angle_regularization
Conflicts with: build.geometry.static_mesh

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/mesh.dip:13
Declaration: maximum_face_angle_factor float = 2.25
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:77
Modification: maximum_face_angle_factor = 2.25

Notes

Author guidance (advisory; not enforced by these metadata fields):

mesh.regularization.shaping_factor

shaping factor

EFFECTIVE VALUE0

Centre-of-mass mesh-roundness threshold; zero disables this criterion.

Try changing this parameter ↗

Type float64

Scientific impact Large centre-of-mass offsets suppress refinement and add mesh-generator motion to restore roundness.

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_regularization
Supplied by schema: mesh_regularization
Validation condition: {.} >= 0
Scientific impact: Large centre-of-mass offsets suppress refinement and add mesh-generator motion to restore roundness.
Conflicts with: build.geometry.static_mesh, build.mesh.face_angle_regularization

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/mesh.dip:24
Declaration: shaping_factor float = 1
Modified at: profile.dip:116
Modification: shaping_factor = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

mesh.regularization.shaping_speed

shaping speed

EFFECTIVE VALUE0.5

Speed of mesh regularization.

Try changing this parameter ↗

Type float64

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: mesh_settings, mesh_regularization
Supplied by schema: mesh_regularization
Validation condition: {.} >= 0
Performance impact: Controls the strength of mesh-generator motion used to restore cell roundness.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/mesh.dip:5
Declaration: shaping_speed float = 0.5
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:76
Modification: shaping_speed = 0.5

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Output

7 parameters

output.schedule.enabled

enabled

EFFECTIVE VALUEtrue

Whether Arepo reads an explicit output-time schedule file.

Try changing this parameter ↗

Type bool

Scientific impact Selects explicitly chosen output epochs instead of the regular cadence defined by simulation.time.first_snapshot and simulation.time.snapshot_interval.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: output_settings, output_schedule_settings
Supplied by schema: output_schedule_settings
Scientific impact: Selects explicitly chosen output epochs instead of the regular cadence defined by simulation.time.first_snapshot and simulation.time.snapshot_interval.
Requires: output.schedule.filename

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/output.dip:6
Declaration: enabled bool = false
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:9
Modification: enabled = false
Modified at: profile.dip:45
Modification: enabled = true

Notes

Author guidance (advisory; not enforced by these metadata fields):

output.schedule.filename

filename

EFFECTIVE VALUE"./output_list.txt"

Path to the output-time schedule file when scheduling is enabled.

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: output_settings, output_schedule_settings
Supplied by schema: output_schedule_settings

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/output.dip:15
Declaration: filename str
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:10
Modification: filename = "ol"
Modified at: profile.dip:46
Modification: filename = "./output_list.txt"

output.snapshots.base_name

base name

EFFECTIVE VALUE"snap"

Prefix used for snapshot filenames.

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: output_settings, snapshot_settings
Supplied by schema: snapshot_settings

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/snapshots.dip:11
Declaration: base_name str
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:13
Modification: base_name = "snap"

output.snapshots.directory

files

EFFECTIVE VALUE1

Number of files produced for each snapshot.

Try changing this parameter ↗

Type int64

Validation {.} >= 1

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: output_settings, snapshot_settings
Supplied by schema: snapshot_settings
Validation condition: {.} >= 1
Recommended range: 1 through the number of MPI ranks.
Performance impact: Splitting a snapshot can improve I/O throughput and avoid very large files, depending on the filesystem.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/snapshots.dip:29
Declaration: files int
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:15
Modification: files = 1

Notes

Author guidance (advisory; not enforced by these metadata fields):

output.snapshots.format

format

EFFECTIVE VALUE3

Arepo snapshot serialization format.

Try changing this parameter ↗

Type int64

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: output_settings, snapshot_settings
Supplied by schema: snapshot_settings
Allowed options: 1, 2, 3
Recommended range: 3 (HDF5), unless a legacy binary format is specifically required.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/snapshots.dip:17
Declaration: format int
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:14
Modification: format = 3

Notes

Author guidance (advisory; not enforced by these metadata fields):

output.snapshots.parallel_files

parallel files

EFFECTIVE VALUE1

Maximum number of snapshot files written concurrently.

Try changing this parameter ↗

Type int64

Validation {.} >= 1

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: output_settings, snapshot_settings
Supplied by schema: snapshot_settings
Validation condition: {.} >= 1
Recommended range: No greater than the number of MPI ranks.
Performance impact: Restricting concurrency can protect heavily used filesystems on large runs, at the cost of slower I/O.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/snapshots.dip:38
Declaration: parallel_files int
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:16
Modification: parallel_files = 1

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Output Schedule

2 parameters

output_schedule.scale_factor

scale factor

EFFECTIVE VALUE[0.0197, 0.2, 0.25, 0.33, 0.5, 0.66, 1]

Try changing this parameter ↗

Type float64Shape 7

Schema & provenance

Source history

Declared at: DIP0_FILE18_TABLE:1
Declaration: scale_factor float

output_schedule.write_flag

write flag

EFFECTIVE VALUE[1, 1, 1, 1, 1, 1, 1]

Try changing this parameter ↗

Type int32Shape 7

Schema & provenance

Source history

Declared at: DIP0_FILE18_TABLE:2
Declaration: write_flag int

PARAMETER GROUP

Resources

6 parameters

resources.execution.resubmit

resubmit

EFFECTIVE VALUEfalse

Whether Arepo should submit a continuation job after reaching its time limit.

Try changing this parameter ↗

Type bool

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: resources_settings, execution_resources
Supplied by schema: execution_resources
Requires: resources.execution.resubmit_command

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/resources.dip:48
Declaration: resubmit bool = false
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:25
Modification: resubmit = false

Notes

Author guidance (advisory; not enforced by these metadata fields):

resources.execution.resubmit_command

resubmit command

EFFECTIVE VALUE"my-scriptfile"

Command used to submit the continuation job when resubmission is enabled.

Try changing this parameter ↗

Type str

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: resources_settings, execution_resources
Supplied by schema: execution_resources

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/resources.dip:55
Declaration: resubmit_command str
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:26
Modification: resubmit_command = "my-scriptfile"

resources.memory.per_rank

per rank

EFFECTIVE VALUE3500

Memory allocated to each MPI rank, in MiB.

Try changing this parameter ↗

Type int64

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: resources_settings, memory_resources
Supplied by schema: memory_resources
Validation condition: {.} > 0
Recommended range: Up to about 95% of physical memory available per MPI rank.
Performance impact: Arepo reserves one contiguous pool of this size at startup; insufficient space terminates the run, while excessive allocation leaves too little room for MPI and the operating system.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/resources.dip:5
Declaration: per_rank int
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:19
Modification: per_rank = 2500
Modified at: profile.dip:51
Modification: per_rank = 3500

Notes

Author guidance (advisory; not enforced by these metadata fields):

resources.wall_clock.limit

limit

EFFECTIVE VALUE9e4

Wall-clock limit before Arepo stops cleanly for restart.

Try changing this parameter ↗

Type float64Units s

Validation {.} > 0 s

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: resources_settings, wall_clock_resources
Supplied by schema: wall_clock_resources
Validation condition: {.} > 0 s
Rationale: Arepo begins clean termination and restart-file writing after 85% of this limit, reserving the remaining time for the final timestep and I/O.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/resources.dip:20
Declaration: limit float s
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:21
Modification: limit = 90000 s

Notes

Author guidance (advisory; not enforced by these metadata fields):

resources.wall_clock.log_flush_interval

log flush interval

EFFECTIVE VALUE0

Interval between explicit log-file flushes; zero leaves this disabled.

Try changing this parameter ↗

Type float64Units s

Validation {.} >= 0 s

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: resources_settings, wall_clock_resources
Supplied by schema: wall_clock_resources
Validation condition: {.} >= 0 s
Performance impact: A shorter interval improves log durability but increases filesystem activity.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/resources.dip:36
Declaration: log_flush_interval float s
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:23
Modification: log_flush_interval = 0 s

Notes

Author guidance (advisory; not enforced by these metadata fields):

resources.wall_clock.restart_interval

restart interval

EFFECTIVE VALUE7.2e3

Interval between restart-file writes.

Try changing this parameter ↗

Type float64Units s

Validation {.} >= 0 s

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: resources_settings, wall_clock_resources
Supplied by schema: wall_clock_resources
Validation condition: {.} >= 0 s
Performance impact: Shorter intervals reduce work lost after an unexpected interruption but increase restart I/O.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/resources.dip:28
Declaration: restart_interval float s
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:22
Modification: restart_interval = 9000 s
Modified at: profile.dip:53
Modification: restart_interval = 7200 s

Notes

Author guidance (advisory; not enforced by these metadata fields):

PARAMETER GROUP

Simulation

13 parameters

simulation.domain.boundary

boundary

EFFECTIVE VALUE"periodic"

Whether the simulation domain has periodic boundaries.

Try changing this parameter ↗

Type str

Scientific impact Controls gravitational boundary conditions; hydrodynamic boundaries are compile-time directional settings.

Schema & provenance

Model metadata

Applied schemas: simulation_settings, simulation_domain
Supplied by schema: simulation_domain
Allowed options: periodic, non_periodic
Scientific impact: Controls gravitational boundary conditions; hydrodynamic boundaries are compile-time directional settings.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/simulation.dip:17
Declaration: boundary str
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:29
Modification: boundary = "periodic"

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.domain.box.size

size

EFFECTIVE VALUE1e5

Simulation-box edge length in the selected Arepo code-length unit.

Try changing this parameter ↗

Type float64Units arepo_length

Scientific impact Initial-condition coordinates normally must lie within [0, BoxSize] in every dimension.

Validation {.} > 0 arepo_length

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_domain, simulation_box
Supplied by schema: simulation_box
Validation condition: {.} > 0 arepo_length
Scientific impact: Initial-condition coordinates normally must lie within [0, BoxSize] in every dimension.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/simulation.dip:5
Declaration: size float arepo_length
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:31
Modification: size = 1 arepo_length
Modified at: profile.dip:57
Modification: size = 100000 arepo_length

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.begin

begin

EFFECTIVE VALUE0.01961

Initial integration coordinate; often derived from the initial redshift.

Try changing this parameter ↗

Type float64

Scientific impact For a cosmological run this is the initial scale factor.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Expression: 1 / ( 1 + {?simulation.time.initial_redshift} )
Reads during evaluation: ?simulation.time.initial_redshift
Scientific impact: For a cosmological run this is the initial scale factor.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/simulation.dip:51
Declaration: begin float
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:36
Modification: begin = 0
Modified at: profile.dip:62
Modification: begin float = ( 1 / ( 1 + {?simulation.time.initial_redshift} ) )

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.coordinate

coordinate

EFFECTIVE VALUE"scale_factor"

Independent coordinate used by the time integrator.

Try changing this parameter ↗

Type str

Scientific impact With scale_factor, Arepo evolves an expanding cosmology and uses scale factor as its time coordinate; linear uses Newtonian physical coordinates.

Schema & provenance

Model metadata

Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Allowed options: scale_factor, linear
Scientific impact: With scale_factor, Arepo evolves an expanding cosmology and uses scale factor as its time coordinate; linear uses Newtonian physical coordinates.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/simulation.dip:35
Declaration: coordinate str
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:33
Modification: coordinate = "linear"
Modified at: profile.dip:59
Modification: coordinate = "scale_factor"

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.end

end

EFFECTIVE VALUE1

Final integration coordinate.

Try changing this parameter ↗

Type float64

Scientific impact For a cosmological run this is the final scale factor.

Validation {.} >= {?simulation.time.begin}

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Validation condition: {.} >= {?simulation.time.begin}
Expression: 1 / ( 1 + {?simulation.time.final_redshift} )
Reads during evaluation: ?simulation.time.final_redshift
Scientific impact: For a cosmological run this is the final scale factor.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/simulation.dip:58
Declaration: end float
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:37
Modification: end = 1
Modified at: profile.dip:63
Modification: end float = ( 1 / ( 1 + {?simulation.time.final_redshift} ) )

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.final_redshift

final redshift

EFFECTIVE VALUE0

Redshift at which a cosmological integration ends.

Try changing this parameter ↗

Type float64

Schema & provenance

Model metadata

Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Used by: cosmology.final_redshift, simulation.time.end

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/simulation.dip:48
Declaration: final_redshift float
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:35
Modification: final_redshift = 0
Modified at: profile.dip:61
Modification: final_redshift = 0

simulation.time.first_snapshot

first snapshot

EFFECTIVE VALUE0

First regularly spaced snapshot time when no output schedule is used.

Try changing this parameter ↗

Type float64

Scientific impact For cosmological simulations this is the first output scale factor.

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Scientific impact: For cosmological simulations this is the first output scale factor.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/simulation.dip:94
Declaration: first_snapshot float
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:41
Modification: first_snapshot = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.initial_redshift

initial redshift

EFFECTIVE VALUE50

Redshift represented by the initial conditions.

Try changing this parameter ↗

Type float64

Schema & provenance

Model metadata

Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Used by: cosmology.initial_redshift, simulation.time.begin

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/simulation.dip:45
Declaration: initial_redshift float
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:34
Modification: initial_redshift = 0
Modified at: profile.dip:60
Modification: initial_redshift = 50

simulation.time.maximum_step

maximum step

EFFECTIVE VALUE5e-3

Maximum permitted integration step.

Try changing this parameter ↗

Type float64

Scientific impact For comoving integrations this caps dln(a).

Validation {.} > 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Validation condition: {.} > 0
Rationale: Protects particles with very small accelerations from unphysically large timesteps.
Scientific impact: For comoving integrations this caps dln(a).

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/simulation.dip:66
Declaration: maximum_step float
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:38
Modification: maximum_step = 0.1
Modified at: profile.dip:64
Modification: maximum_step = 0.005

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.minimum_step

minimum step

EFFECTIVE VALUE0

Minimum permitted integration step; zero delegates the lower limit to Arepo.

Try changing this parameter ↗

Type float64

Scientific impact A requested smaller step normally stops Arepo; NOSTOP_WHEN_BELOW_MINTIMESTEP instead clamps it to this value.

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Validation condition: {.} >= 0
Scientific impact: A requested smaller step normally stops Arepo; NOSTOP_WHEN_BELOW_MINTIMESTEP instead clamps it to this value.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/simulation.dip:76
Declaration: minimum_step float
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:39
Modification: minimum_step = 1e-10
Modified at: profile.dip:65
Modification: minimum_step = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.snapshot_interval

snapshot interval

EFFECTIVE VALUE0

Spacing of regular snapshots when no output schedule is used.

Try changing this parameter ↗

Type float64

Scientific impact Spacing is logarithmic in scale factor for cosmological runs and linear in time otherwise.

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Validation condition: {.} >= 0
Scientific impact: Spacing is logarithmic in scale factor for cosmological runs and linear in time otherwise.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/simulation.dip:101
Declaration: snapshot_interval float
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:42
Modification: snapshot_interval = 1
Modified at: profile.dip:67
Modification: snapshot_interval = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.statistics_interval

statistics interval

EFFECTIVE VALUE0.01

Interval between time-statistics reports.

Try changing this parameter ↗

Type float64

Validation {.} >= 0

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Validation condition: {.} >= 0
Performance impact: More frequent measurements increase diagnostic I/O; gravitational potential energy additionally requires build.gravity.evaluate_potential.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/simulation.dip:85
Declaration: statistics_interval float
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:40
Modification: statistics_interval = 0.005
Modified at: profile.dip:66
Modification: statistics_interval = 0.01

Notes

Author guidance (advisory; not enforced by these metadata fields):

simulation.time.timestep_criterion

timestep criterion

EFFECTIVE VALUE0

Global time-step criterion used by Arepo.

Try changing this parameter ↗

Type int64

Schema & provenance

Model metadata

Tags: arepo:param
Applied schemas: simulation_settings, simulation_time
Supplied by schema: simulation_time
Allowed options: 0, 1
Recommended range: 0; this is the only criterion currently supported by Arepo.

Source history

Declared at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/schemas/simulation.dip:109
Declaration: timestep_criterion int
Modified at: projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/../../profiles/ideal_hydrodynamics.dip:43
Modification: timestep_criterion = 0

Notes

Author guidance (advisory; not enforced by these metadata fields):

Generated from SNT's Brief++ JSON document for projects/arepo/dipl/examples/cosmo_zoom_gravity_only_3d/DIPfile. Version: 0.9.3. The parameter values describe this bundled example; inspect a run's environment.diph5 to see overridden values.