EVALUATED PARAMETER REFERENCE

interacting blastwaves 1d.

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

152 model parameters12 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

Build

67 parameters

build.analysis.fof

fof

EFFECTIVE VALUEfalse

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:382
Declaration: fof bool = false

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:387
Declaration: primary_link_type_mask int = 2

build.analysis.fof.secondary_link_type_mask

secondary link type mask

EFFECTIVE VALUE0

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:393
Declaration: secondary_link_type_mask int = 0

build.analysis.subfind

subfind

EFFECTIVE VALUEfalse

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:399
Declaration: subfind bool = false

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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:405
Declaration: save_density_estimates bool = false

build.boundaries.x_mode

x mode

EFFECTIVE VALUE1

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:8
Declaration: x_mode int = 0
Modified at: profile.dip:7
Modification: x_mode = 1

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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:452
Declaration: debug bool = false
Modified at: profile.dip:25
Modification: debug = true

build.geometry.one_dimensional

one dimensional

EFFECTIVE VALUEtrue

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:31
Declaration: one_dimensional bool = false
Modified at: profile.dip:9
Modification: one_dimensional = true

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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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 VALUEfalse

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:128
Declaration: direct_summation bool = false

Notes

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

build.gravity.direct_summation.threshold

threshold

EFFECTIVE VALUE3000

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:135
Declaration: threshold int = 3000

Notes

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

build.gravity.evaluate_potential

evaluate potential

EFFECTIVE VALUEfalse

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:221
Declaration: evaluate_potential bool = false

Notes

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

build.gravity.hierarchical

hierarchical

EFFECTIVE VALUEfalse

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:115
Declaration: hierarchical bool = false

Notes

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

build.gravity.individual_softening_type_mask

individual softening type mask

EFFECTIVE VALUE0

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:154
Declaration: individual_softening_type_mask int = 0

Notes

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

build.gravity.multiple_node_softening

multiple node softening

EFFECTIVE VALUEfalse

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:145
Declaration: multiple_node_softening bool = false

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:216
Declaration: non_periodic bool = false

build.gravity.particle_mesh

particle mesh

EFFECTIVE VALUEfalse

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:163
Declaration: particle_mesh bool = false

build.gravity.particle_mesh.enlarge_high_resolution_region

enlarge high resolution region

EFFECTIVE VALUE0

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:193
Declaration: enlarge_high_resolution_region float = 0

Notes

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

build.gravity.particle_mesh.grid_resolution

grid resolution

EFFECTIVE VALUE0

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:166
Declaration: grid_resolution int = 0

Notes

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

build.gravity.particle_mesh.high_resolution_grid_boost

high resolution grid boost

EFFECTIVE VALUE0

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:201
Declaration: high_resolution_grid_boost int = 0

Notes

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

build.gravity.particle_mesh.high_resolution_type_mask

high resolution type mask

EFFECTIVE VALUE0

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:185
Declaration: high_resolution_type_mask int = 0

Notes

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

build.gravity.particle_mesh.short_range_cutoff

short range cutoff

EFFECTIVE VALUE4.5

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:176
Declaration: short_range_cutoff float = 4.5

Notes

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

build.gravity.particle_mesh.zoom_optimized

zoom optimized

EFFECTIVE VALUEfalse

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:209
Declaration: zoom_optimized bool = false

Notes

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

build.gravity.self_gravity

self gravity

EFFECTIVE VALUEfalse

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:110
Declaration: self_gravity bool = false

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:229
Declaration: softening_types int = 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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:274
Declaration: hdf5 bool = false
Modified at: profile.dip:23
Modification: hdf5 = true

build.io.input_double_precision

input double precision

EFFECTIVE VALUEtrue

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:288
Declaration: input_double_precision bool = false
Modified at: profile.dip:21
Modification: input_double_precision = true

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:293
Declaration: output_coordinates_double bool = false

build.io.output_double_precision

output double precision

EFFECTIVE VALUEtrue

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:298
Declaration: output_double_precision bool = false
Modified at: profile.dip:22
Modification: output_double_precision = true

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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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 VALUEtrue

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:340
Declaration: center_of_mass_drift bool = false
Modified at: profile.dip:13
Modification: center_of_mass_drift = true

build.mesh.drift_limited_by_sound_speed

drift limited by sound speed

EFFECTIVE VALUEtrue

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:345
Declaration: drift_limited_by_sound_speed bool = false
Modified at: profile.dip:14
Modification: drift_limited_by_sound_speed = true

Notes

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

build.mesh.face_angle_regularization

face angle regularization

EFFECTIVE VALUEtrue

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:335
Declaration: face_angle_regularization bool = false
Modified at: profile.dip:15
Modification: face_angle_regularization = true

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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:431
Declaration: magnetic_field_gradient bool = false

build.output.potential

potential

EFFECTIVE VALUEfalse

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:446
Declaration: potential bool = false

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:441
Declaration: pressure_gradient bool = false

build.output.process_schedule_exactly

process schedule exactly

EFFECTIVE VALUEfalse

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:421
Declaration: process_schedule_exactly bool = false

build.physics.adiabatic_index

adiabatic index

EFFECTIVE VALUE1.4

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:101
Declaration: adiabatic_index float = 0
Modified at: profile.dip:11
Modification: adiabatic_index = 1.4

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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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 VALUEfalse

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:263
Declaration: fftw_double bool = false

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:252
Declaration: mode int = 0
Modified at: profile.dip:19
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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:268
Declaration: neighbor_tree_double bool = false

build.time.force_equal_timesteps

force equal timesteps

EFFECTIVE VALUEtrue

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:239
Declaration: force_equal_timesteps bool = false
Modified at: profile.dip:17
Modification: force_equal_timesteps = true

Notes

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

build.time.tree_based_timesteps

tree based timesteps

EFFECTIVE VALUEfalse

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/interacting_blastwaves_1d/../../profiles/schemas/build.dip:246
Declaration: tree_based_timesteps bool = false

PARAMETER GROUP

Code Units

3 parameters

code_units.length

length

EFFECTIVE VALUE1

One Arepo length unit (one centimetre).

Try changing this parameter ↗

Type float64Units cm

Schema & provenance

Model metadata

Tags: arepo:param
Rationale: Together with mass and velocity, this base determines Arepo's internal time unit.

Source history

Declared at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/standard_units.dip:3
Declaration: length float = 1 cm

Notes

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

code_units.mass

mass

EFFECTIVE VALUE1

One Arepo mass unit (one gram).

Try changing this parameter ↗

Type float64Units g

Schema & provenance

Model metadata

Tags: arepo:param
Rationale: Together with length and velocity, this base determines Arepo's internal time unit.

Source history

Declared at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/standard_units.dip:10
Declaration: mass float = 1 g

Notes

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

code_units.velocity

velocity

EFFECTIVE VALUE1

One Arepo velocity unit (one centimetre per second).

Try changing this parameter ↗

Type float64Units cm*s-1

Schema & provenance

Model metadata

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

Source history

Declared at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/standard_units.dip:17
Declaration: velocity float = 1 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/interacting_blastwaves_1d/../../profiles/schemas/cosmology.dip:12
Declaration: baryon_density float
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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

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
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/interacting_blastwaves_1d/../../profiles/schemas/cosmology.dip:33
Declaration: dark_energy_density float
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:50
Modification: dark_energy_density float = 0

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/interacting_blastwaves_1d/../../profiles/schemas/cosmology.dip:41
Declaration: dark_matter_density float
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../profiles/schemas/cosmology.dip:30
Declaration: final_redshift float
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:49
Modification: final_redshift = {?simulation.time.final_redshift}

cosmology.hubble_parameter

hubble parameter

EFFECTIVE VALUE1

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/interacting_blastwaves_1d/../../profiles/schemas/cosmology.dip:19
Declaration: hubble_parameter float
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:47
Modification: hubble_parameter = 1

Notes

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

cosmology.initial_redshift

initial redshift

EFFECTIVE VALUE0

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/interacting_blastwaves_1d/../../profiles/schemas/cosmology.dip:27
Declaration: initial_redshift float
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:48
Modification: initial_redshift = {?simulation.time.initial_redshift}

cosmology.matter_density

matter density

EFFECTIVE VALUE0

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
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/interacting_blastwaves_1d/../../profiles/schemas/cosmology.dip:5
Declaration: matter_density float
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:45
Modification: matter_density = 0

Notes

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

PARAMETER GROUP

Datasets

6 parameters

datasets.reference_001.data.density

density

EFFECTIVE VALUE

[0.1458, 0.1458, 0.1458, 0.1458, 0.1459, 0.1459, 0.1459, 0.146, 0.146, 0.1461, 0.1461, 0.1462, 0.1463, 0.1463, 0.1464, 0.1465, 0.1466, 0.1466, 0.1467, 0.1468, 0.1468, 0.1469, 0.147, 0.147, 0.1471, 0.1472, 0.1473, 0.1473, 0.1474, 0.1475, 0.1475, 0.1476, 0.1477, 0.1477, 0.1478, 0.1479, 0.148, 0.148, 0.1481, 0.1482, 0.1482, 0.1483, 0.1484, 0.1484, 0.1485, 0.1486, 0.1486, 0.1487, 0.1488, 0.1489, 0.1489, 0.149, 0.1491, 0.1491, 0.1492, 0.1493, 0.1493, 0.1494, 0.1495, 0.1496, 0.1496, 0.1497, 0.1498, 0.1498, 0.1499, 0.15, 0.1501, 0.1501, 0.1502, 0.1503, 0.1503, 0.1504, 0.1505, 0.1506, 0.1506, 0.1507, 0.1508, 0.1509, 0.1509, 0.151, 0.1511, 0.1512, 0.1513, 0.1513, 0.1514, 0.1515, 0.1516, 0.1517, 0.1517, 0.1518, 0.1519, 0.152, 0.1521, 0.1521, 0.1522, 0.1523, 0.1524, 0.1525, 0.1526, 0.1526, 0.1527, 0.1528, 0.1529, 0.153, 0.153, 0.1531, 0.1532, 0.1533, 0.1534, 0.1534, 0.1535, 0.1536, 0.1537, 0.1538, 0.1539, 0.1539, 0.154, 0.1541, 0.1542, 0.1543, 0.1543, 0.1544, 0.1545, 0.1546, 0.1547, 0.1548, 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Try changing this parameter ↗

Type float64Shape 1000

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:2
Declaration: density float

datasets.reference_001.data.position

position

EFFECTIVE VALUE

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Try changing this parameter ↗

Type float64Shape 1000

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:1
Declaration: position float

datasets.reference_001.data.pressure

pressure

EFFECTIVE VALUE

[67.49, 67.49, 67.5, 67.51, 67.53, 67.55, 67.58, 67.61, 67.64, 67.68, 67.72, 67.76, 67.8, 67.84, 67.89, 67.94, 67.98, 68.03, 68.08, 68.12, 68.17, 68.21, 68.26, 68.3, 68.35, 68.4, 68.44, 68.49, 68.53, 68.58, 68.62, 68.67, 68.71, 68.76, 68.8, 68.85, 68.89, 68.94, 68.98, 69.03, 69.07, 69.12, 69.16, 69.21, 69.25, 69.3, 69.34, 69.39, 69.44, 69.48, 69.53, 69.57, 69.62, 69.66, 69.71, 69.76, 69.8, 69.85, 69.89, 69.94, 69.99, 70.03, 70.08, 70.13, 70.17, 70.22, 70.27, 70.31, 70.36, 70.41, 70.46, 70.5, 70.55, 70.6, 70.65, 70.7, 70.75, 70.8, 70.85, 70.9, 70.95, 71, 71.05, 71.11, 71.16, 71.21, 71.27, 71.32, 71.37, 71.43, 71.48, 71.53, 71.59, 71.64, 71.7, 71.75, 71.8, 71.86, 71.91, 71.96, 72.02, 72.07, 72.12, 72.18, 72.23, 72.29, 72.34, 72.39, 72.45, 72.5, 72.55, 72.61, 72.66, 72.72, 72.77, 72.82, 72.88, 72.93, 72.99, 73.04, 73.09, 73.15, 73.2, 73.26, 73.31, 73.37, 73.42, 73.47, 73.53, 73.58, 73.64, 73.69, 73.75, 73.8, 73.85, 73.91, 73.96, 74.02, 74.07, 74.13, 74.18, 74.24, 74.29, 74.35, 74.4, 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Try changing this parameter ↗

Type float64Shape 1000

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:4
Declaration: pressure float

datasets.reference_001.data.velocity

velocity

EFFECTIVE VALUE

[2.995e-4, 0.01221, 0.02414, 0.03608, 0.04804, 0.06, 0.07196, 0.08388, 0.09572, 0.1075, 0.1191, 0.1306, 0.1419, 0.1531, 0.1641, 0.1748, 0.1855, 0.1964, 0.2075, 0.2188, 0.2302, 0.2417, 0.2532, 0.2648, 0.2765, 0.2882, 0.2999, 0.3117, 0.3235, 0.3353, 0.3471, 0.359, 0.3708, 0.3827, 0.3945, 0.4064, 0.4183, 0.4302, 0.4421, 0.454, 0.466, 0.4779, 0.4898, 0.5018, 0.5137, 0.5257, 0.5376, 0.5496, 0.5615, 0.5735, 0.5855, 0.5975, 0.6095, 0.6214, 0.6334, 0.6454, 0.6574, 0.6694, 0.6814, 0.6934, 0.7053, 0.7173, 0.7293, 0.7412, 0.7531, 0.7651, 0.7769, 0.7888, 0.8006, 0.8124, 0.8241, 0.8358, 0.8474, 0.859, 0.8705, 0.8819, 0.8932, 0.9045, 0.9157, 0.9268, 0.9378, 0.9487, 0.9596, 0.9703, 0.981, 0.9916, 1.002, 1.013, 1.023, 1.034, 1.044, 1.055, 1.065, 1.076, 1.086, 1.097, 1.108, 1.118, 1.129, 1.14, 1.15, 1.161, 1.172, 1.183, 1.193, 1.204, 1.215, 1.226, 1.237, 1.247, 1.258, 1.269, 1.28, 1.291, 1.302, 1.313, 1.324, 1.335, 1.345, 1.356, 1.367, 1.378, 1.389, 1.4, 1.411, 1.422, 1.433, 1.444, 1.455, 1.466, 1.477, 1.488, 1.499, 1.511, 1.522, 1.533, 1.544, 1.555, 1.566, 1.577, 1.588, 1.599, 1.611, 1.622, 1.633, 1.644, 1.655, 1.666, 1.678, 1.689, 1.7, 1.711, 1.723, 1.734, 1.745, 1.756, 1.768, 1.779, 1.79, 1.801, 1.813, 1.824, 1.835, 1.847, 1.858, 1.869, 1.881, 1.892, 1.904, 1.915, 1.926, 1.938, 1.949, 1.961, 1.972, 1.983, 1.995, 2.006, 2.018, 2.029, 2.041, 2.052, 2.064, 2.075, 2.087, 2.098, 2.11, 2.121, 2.133, 2.144, 2.156, 2.167, 2.179, 2.191, 2.202, 2.214, 2.225, 2.237, 2.249, 2.26, 2.272, 2.284, 2.295, 2.307, 2.319, 2.33, 2.342, 2.354, 2.365, 2.377, 2.389, 2.401, 2.412, 2.424, 2.436, 2.448, 2.459, 2.471, 2.483, 2.495, 2.507, 2.518, 2.53, 2.542, 2.554, 2.566, 2.578, 2.589, 2.601, 2.613, 2.625, 2.637, 2.649, 2.661, 2.673, 2.685, 2.696, 2.708, 2.72, 2.732, 2.744, 2.756, 2.768, 2.78, 2.792, 2.804, 2.816, 2.828, 2.84, 2.852, 2.864, 2.876, 2.888, 2.9, 2.913, 2.925, 2.937, 2.949, 2.961, 2.973, 2.985, 2.997, 3.009, 3.022, 3.034, 3.046, 3.058, 3.07, 3.082, 3.095, 3.107, 3.119, 3.131, 3.143, 3.156, 3.168, 3.18, 3.192, 3.205, 3.217, 3.229, 3.241, 3.254, 3.266, 3.278, 3.29, 3.303, 3.315, 3.327, 3.34, 3.352, 3.364, 3.377, 3.389, 3.402, 3.414, 3.426, 3.439, 3.451, 3.464, 3.476, 3.488, 3.501, 3.513, 3.526, 3.538, 3.551, 3.563, 3.575, 3.588, 3.6, 3.613, 3.625, 3.638, 3.65, 3.663, 3.676, 3.688, 3.701, 3.713, 3.726, 3.738, 3.751, 3.763, 3.776, 3.789, 3.801, 3.814, 3.826, 3.839, 3.852, 3.864, 3.877, 3.89, 3.902, 3.915, 3.928, 3.94, 3.953, 3.966, 3.978, 3.991, 4.004, 4.016, 4.029, 4.042, 4.055, 4.067, 4.08, 4.093, 4.106, 4.118, 4.131, 4.144, 4.157, 4.17, 4.182, 4.195, 4.208, 4.221, 4.234, 4.247, 4.259, 4.272, 4.285, 4.298, 4.311, 4.324, 4.337, 4.35, 4.363, 4.375, 4.388, 4.401, 4.414, 4.427, 4.44, 4.453, 4.466, 4.479, 4.492, 4.505, 4.518, 4.531, 4.544, 4.557, 4.57, 4.583, 4.596, 4.609, 4.622, 4.635, 4.648, 4.662, 4.675, 4.689, 4.702, 4.716, 4.73, 4.744, 4.759, 4.773, 4.788, 4.804, 4.82, 4.836, 4.853, 4.87, 4.887, 4.905, 4.923, 4.941, 4.959, 4.977, 4.995, 5.014, 5.033, 5.052, 5.071, 5.09, 5.11, 5.13, 5.15, 5.17, 5.19, 5.211, 5.231, 5.251, 5.272, 5.292, 5.313, 5.334, 5.354, 5.375, 5.396, 5.417, 5.438, 5.458, 5.479, 5.5, 5.521, 5.542, 5.563, 5.584, 5.604, 5.625, 5.646, 5.667, 5.688, 5.709, 5.73, 5.751, 5.772, 5.793, 5.814, 5.835, 5.856, 5.877, 5.898, 5.919, 5.94, 5.961, 5.982, 6.003, 6.024, 6.045, 6.066, 6.087, 6.108, 6.129, 6.15, 6.171, 6.192, 6.213, 6.234, 6.255, 6.276, 6.297, 6.318, 6.339, 6.36, 6.381, 6.402, 6.423, 6.445, 6.466, 6.487, 6.508, 6.529, 6.55, 6.571, 6.592, 6.613, 6.634, 6.655, 6.676, 6.697, 6.718, 6.74, 6.761, 6.782, 6.803, 6.824, 6.845, 6.866, 6.887, 6.908, 6.93, 6.951, 6.972, 6.993, 7.014, 7.035, 7.056, 7.077, 7.098, 7.12, 7.141, 7.162, 7.183, 7.204, 7.225, 7.246, 7.268, 7.289, 7.31, 7.331, 7.352, 7.373, 7.395, 7.416, 7.437, 7.458, 7.479, 7.5, 7.522, 7.543, 7.564, 7.585, 7.606, 7.628, 7.649, 7.67, 7.691, 7.712, 7.733, 7.755, 7.776, 7.797, 7.818, 7.84, 7.861, 7.882, 7.903, 7.924, 7.946, 7.967, 7.988, 8.009, 8.031, 8.052, 8.073, 8.094, 8.115, 8.137, 8.158, 8.179, 8.2, 8.222, 8.243, 8.264, 8.285, 8.307, 8.328, 8.349, 8.37, 8.392, 8.413, 8.434, 8.456, 8.477, 8.498, 8.519, 8.541, 8.562, 8.583, 8.605, 8.626, 8.647, 8.668, 8.69, 8.711, 8.732, 8.754, 8.775, 8.796, 8.818, 8.839, 8.86, 8.882, 8.903, 8.925, 8.946, 8.968, 8.989, 9.011, 9.032, 9.054, 9.075, 9.097, 9.119, 9.14, 9.162, 9.184, 9.205, 9.227, 9.249, 9.271, 9.292, 9.314, 9.336, 9.358, 9.38, 9.402, 9.424, 9.445, 9.467, 9.489, 9.511, 9.533, 9.555, 9.577, 9.599, 9.621, 9.644, 9.666, 9.688, 9.71, 9.732, 9.754, 9.776, 9.798, 9.821, 9.843, 9.865, 9.887, 9.91, 9.932, 1.115, 1.182, 1.247, 1.305, 1.352, 1.391, 1.43, 1.469, 1.507, 1.546, 1.585, 1.624, 1.663, 1.702, 1.741, 1.781, 1.821, 1.864, 1.912, 1.967, 2.029, 2.098, 2.172, 2.25, 2.331, 2.414, 2.498, 2.585, 2.672, 2.76, 2.848, 2.938, 3.027, 3.118, 3.208, 3.299, 3.39, 3.481, 3.572, 3.663, 3.754, 3.846, 3.937, 4.028, 4.119, 4.21, 4.301, 4.392, 4.483, 4.574, 4.665, 4.756, 4.847, 4.937, 5.028, 5.119, 5.21, 5.301, 5.392, 5.482, 5.573, 5.664, 5.754, 5.845, 5.936, 6.026, 6.117, 6.207, 6.297, 6.388, 6.478, 6.569, 6.659, 6.749, 6.838, 6.928, 7.016, 7.104, 7.192, 7.28, 7.367, 7.454, 7.541, 7.627, 7.714, 7.801, 7.888, 7.975, 8.061, 8.12, 8.183, 8.298, 8.42, 8.538, 8.654, 8.769, 8.883, 8.997, 9.108, 9.211, 9.291, 9.327, 9.353, 9.394, 9.439, 9.486, 9.534, 9.583, 9.632, 9.681, 9.731, 9.781, 9.831, 9.881, 9.931, 9.982, 10.03, 10.08, 10.13, 10.18, 10.23, 10.29, 10.34, 10.39, 10.44, 10.49, 10.54, 10.6, 10.65, 10.69, 10.74, 10.78, 10.82, 10.86, 10.9, 10.93, 10.97, 11, 11.04, 11.07, 11.11, 11.14, 11.18, 11.22, 11.26, 11.3, 11.34, 11.38, 11.42, 11.46, 11.5, 11.54, 11.58, 11.62, 11.66, 11.7, 11.73, 11.77, 11.81, 11.85, 11.89, 11.93, 11.97, 12.01, 12.05, 12.09, 12.13, 12.17, 12.22, 12.26, 12.31, 12.35, 12.4, 12.45, 12.5, 12.55, 12.6, 12.65, 12.71, 12.76, 12.81, 12.87, 12.92, 12.97, 13.03, 13.08, 13.13, 13.19, 13.24, 13.22, 13.22, 13.24, 13.27, 13.29, 13.31, 13.34, 13.36, 13.38, 13.41, 13.43, 13.45, 13.48, 13.5, 13.53, 13.55, 13.57, 13.6, 13.62, 13.65, 13.67, 13.7, 13.72, 13.75, 13.77, 13.79, 13.82, 13.84, 13.87, -2.754e-3, -1.483e-3, -6.353e-4, -2.405e-4, -8.091e-5, -2.5e-5, -5.296e-6, 5.211e-7, 1.892e-6, 1.928e-6, 1.69e-6, 1.497e-6, 1.345e-6, 1.222e-6, 1.072e-6, 8.649e-7, 7.374e-7, 6.766e-7, 6.466e-7, 6.238e-7, 5.475e-7, 4.501e-7, 4.012e-7, 4.285e-7, 4.547e-7, 4.658e-7, 4.036e-7, 3.571e-7, 3.578e-7, 4.196e-7, 4.561e-7, 4.549e-7, 3.898e-7, 3.581e-7, 3.889e-7, 4.481e-7, 4.77e-7, 4.396e-7, 3.791e-7, 3.595e-7, 4.131e-7, 4.547e-7, 4.631e-7, 3.906e-7, 3.404e-7, 3.423e-7, 4.028e-7, 4.323e-7, 4.081e-7, 3.278e-7, 2.892e-7, 3.192e-7, 3.717e-7, 3.864e-7, 3.257e-7, 2.582e-7, 2.4e-7, 2.964e-7, 3.336e-7, 3.266e-7, 2.441e-7, 1.925e-7, 2.013e-7, 2.673e-7, 2.92e-7, 2.577e-7, 1.774e-7, 1.469e-7, 1.862e-7, 2.468e-7, 2.568e-7, 1.881e-7, 1.252e-7, 1.194e-7, 1.872e-7, 2.298e-7, 2.158e-7, 1.295e-7, 8.578e-8, 1.066e-7, 1.816e-7, 2.048e-7, 1.604e-7, 7.892e-8, 5.854e-8, 1.12e-7, 1.723e-7, 1.727e-7, 9.157e-8, 2.985e-8, 3.234e-8, 1.088e-7, 1.244e-7, -1.292e-7, -1.957e-6, -1.287e-5, -7.107e-5, -2.997e-4, -4.6e-4, -4.622e-4, -2.602e-4, -8.197e-5, -1.424e-5, 1.011e-5, 1.715e-5, 1.751e-5, 1.399e-5, 9.869e-6, 6.697e-6, 4.53e-6, 2.942e-6, 1.435e-6, 5.818e-8, -7.033e-7, -8.385e-7, -8.161e-7, -7.576e-7, -6.447e-7, -5.064e-7, -3.086e-7, -9.365e-8, 1.57e-7, 2.146e-7, 1.761e-7, 1.084e-7, 1.372e-7, 1.761e-7, 1.862e-7, 9.453e-8, 3.579e-9, -6.591e-8, -3.415e-9, 5.361e-8, 6.12e-8]

Try changing this parameter ↗

Type float64Shape 1000

Schema & provenance

Source history

Declared at: DIP0_FILE19_TABLE:3
Declaration: velocity float

datasets.reference_001.output_file

output file

EFFECTIVE VALUE"reference_001.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 = "reference_001.txt"

datasets.reference_001.preamble

preamble

EFFECTIVE VALUE

"# position, density, velocity and momentum of 20,000 cells fixed-grid interacting blast wave problem at t=0.038, only every 20th cell stored here"

Try changing this parameter ↗

Type str

Schema & provenance

Source history

Declared at: tables.dip:6
Declaration: preamble str = "# position, density, velocity and momentum of 20,000 cells fixed-grid interacting blast wave problem at t=0.038, only every 20th cell stored here"

PARAMETER GROUP

Experiment

1 parameters

experiment.setup.kind

kind

EFFECTIVE VALUE"interacting_blastwaves_1d"

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/interacting_blastwaves_1d/../../profiles/schemas/experiment.dip:6
Declaration: kind str
Modified at: profile.dip:4
Modification: kind = "interacting_blastwaves_1d"

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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:66
Declaration: active_fraction float = 0.01
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:61
Modification: active_fraction = 0.01
Modified at: profile.dip:34
Modification: active_fraction = 0.01

Notes

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

gravity.domain_decomposition.multiple_domains

multiple domains

EFFECTIVE VALUE2

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:48
Declaration: multiple_domains int = 1
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:59
Modification: multiple_domains = 2

Notes

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

gravity.domain_decomposition.top_node_factor

top node factor

EFFECTIVE VALUE4

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:57
Declaration: top_node_factor float = 2.5
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:60
Modification: top_node_factor = 4

Notes

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

gravity.force_accuracy.integration

integration

EFFECTIVE VALUE0.1

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:6
Declaration: integration float = 0.012
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:54
Modification: integration = 0.1

Notes

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

gravity.force_accuracy.opening_angle

opening angle

EFFECTIVE VALUE0.1

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:14
Declaration: opening_angle float = 0.7
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:55
Modification: opening_angle = 0.1

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:31
Declaration: opening_criterion int = 1
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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 VALUE0.1

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:22
Declaration: relative_force float = 0.0025
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:56
Modification: relative_force = 0.1

Notes

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

gravity.hydro.gas_softening_factor

gas softening factor

EFFECTIVE VALUE0.01

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:79
Declaration: gas_softening_factor float = 1
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:63
Modification: gas_softening_factor = 0.01

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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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 VALUE0.1

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/standard_softenings.dip:6
Modification: length = 0.1 arepo_length

Notes

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

gravity.softenings.comoving[1].length

length

EFFECTIVE VALUE0.1

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/standard_softenings.dip:8
Modification: length = 0.1 arepo_length

Notes

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

gravity.softenings.comoving[2].length

length

EFFECTIVE VALUE0.1

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/standard_softenings.dip:10
Modification: length = 0.1 arepo_length

Notes

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

gravity.softenings.comoving[3].length

length

EFFECTIVE VALUE0.1

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/standard_softenings.dip:12
Modification: length = 0.1 arepo_length

Notes

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

gravity.softenings.comoving[4].length

length

EFFECTIVE VALUE0.1

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/standard_softenings.dip:14
Modification: length = 0.1 arepo_length

Notes

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

gravity.softenings.comoving[5].length

length

EFFECTIVE VALUE0.1

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/standard_softenings.dip:16
Modification: length = 0.1 arepo_length

Notes

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

gravity.softenings.particle_type_map

particle type map

EFFECTIVE VALUE[0, 0, 0, 0, 0, 0]

Try changing this parameter ↗

Type int32Shape 6

Schema & provenance

Model metadata

Applied schemas: gravity_settings

Source history

Declared at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/standard_softenings.dip:30
Declaration: particle_type_map int[6] = [0,0,0,0,0,0]

gravity.softenings.physical_maximum[0].length

length

EFFECTIVE VALUE0.1

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/standard_softenings.dip:19
Modification: length = 0.1 arepo_length

Notes

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

gravity.softenings.physical_maximum[1].length

length

EFFECTIVE VALUE0.1

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/standard_softenings.dip:21
Modification: length = 0.1 arepo_length

Notes

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

gravity.softenings.physical_maximum[2].length

length

EFFECTIVE VALUE0.1

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/standard_softenings.dip:23
Modification: length = 0.1 arepo_length

Notes

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

gravity.softenings.physical_maximum[3].length

length

EFFECTIVE VALUE0.1

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/standard_softenings.dip:25
Modification: length = 0.1 arepo_length

Notes

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

gravity.softenings.physical_maximum[4].length

length

EFFECTIVE VALUE0.1

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/standard_softenings.dip:27
Modification: length = 0.1 arepo_length

Notes

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

gravity.softenings.physical_maximum[5].length

length

EFFECTIVE VALUE0.1

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/interacting_blastwaves_1d/../../profiles/schemas/gravity.dip:111
Declaration: length float = 0.1 arepo_length
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/standard_softenings.dip:29
Modification: length = 0.1 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/interacting_blastwaves_1d/../../profiles/schemas/hydrodynamics.dip:6
Declaration: courant_factor float = 0.3
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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 VALUE0

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/interacting_blastwaves_1d/../../profiles/schemas/hydrodynamics.dip:14
Declaration: initial_gas_temperature float = 0 K
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:66
Modification: initial_gas_temperature = 0 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/interacting_blastwaves_1d/../../profiles/schemas/hydrodynamics.dip:35
Declaration: internal_energy_density_limit float = 0 arepo_density
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../profiles/schemas/hydrodynamics.dip:44
Declaration: internal_energy_floor float = 0 arepo_specific_energy
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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 VALUE2

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/interacting_blastwaves_1d/../../profiles/schemas/hydrodynamics.dip:68
Declaration: maximum_neighbor_deviation int = 4
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:73
Modification: maximum_neighbor_deviation = 2

Notes

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

hydrodynamics.minimum_gas_temperature

minimum gas temperature

EFFECTIVE VALUE0

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/interacting_blastwaves_1d/../../profiles/schemas/hydrodynamics.dip:21
Declaration: minimum_gas_temperature float = 0 K
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:67
Modification: minimum_gas_temperature = 0 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/interacting_blastwaves_1d/../../profiles/schemas/hydrodynamics.dip:53
Declaration: minimum_specific_energy float = 0 arepo_specific_energy
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../profiles/schemas/hydrodynamics.dip:28
Declaration: minimum_startup_density float = 0 arepo_density
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../profiles/schemas/hydrodynamics.dip:60
Declaration: target_neighbors int = 64
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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 VALUE3

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/interacting_blastwaves_1d/../../profiles/schemas/input.dip:12
Declaration: format int
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:6
Modification: format = 3

Notes

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

input.initial_conditions.path

path

EFFECTIVE VALUE"./IC"

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/interacting_blastwaves_1d/../../profiles/schemas/input.dip:5
Declaration: path str
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:5
Modification: path = "./IC"

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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../profiles/schemas/mesh.dip:13
Declaration: maximum_face_angle_factor float = 2.25
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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 VALUE1

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/interacting_blastwaves_1d/../../profiles/schemas/mesh.dip:24
Declaration: shaping_factor float = 1

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/interacting_blastwaves_1d/../../profiles/schemas/mesh.dip:5
Declaration: shaping_speed float = 0.5
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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 VALUEfalse

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/interacting_blastwaves_1d/../../profiles/schemas/output.dip:6
Declaration: enabled bool = false
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:9
Modification: enabled = false

Notes

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

output.schedule.filename

filename

EFFECTIVE VALUE"ol"

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/interacting_blastwaves_1d/../../profiles/schemas/output.dip:15
Declaration: filename str
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:10
Modification: filename = "ol"

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/interacting_blastwaves_1d/../../profiles/schemas/snapshots.dip:11
Declaration: base_name str
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../profiles/schemas/snapshots.dip:29
Declaration: files int
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../profiles/schemas/snapshots.dip:17
Declaration: format int
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../profiles/schemas/snapshots.dip:38
Declaration: parallel_files int
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:16
Modification: parallel_files = 1

Notes

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

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/interacting_blastwaves_1d/../../profiles/schemas/resources.dip:48
Declaration: resubmit bool = false
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../profiles/schemas/resources.dip:55
Declaration: resubmit_command str
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:26
Modification: resubmit_command = "my-scriptfile"

resources.memory.per_rank

per rank

EFFECTIVE VALUE2500

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/interacting_blastwaves_1d/../../profiles/schemas/resources.dip:5
Declaration: per_rank int
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:19
Modification: per_rank = 2500

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/interacting_blastwaves_1d/../../profiles/schemas/resources.dip:20
Declaration: limit float s
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/../../profiles/schemas/resources.dip:36
Declaration: log_flush_interval float s
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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 VALUE9e3

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/interacting_blastwaves_1d/../../profiles/schemas/resources.dip:28
Declaration: restart_interval float s
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:22
Modification: restart_interval = 9000 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/interacting_blastwaves_1d/../../profiles/schemas/simulation.dip:17
Declaration: boundary str
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:29
Modification: boundary = "periodic"

Notes

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

simulation.domain.box.size

size

EFFECTIVE VALUE1

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/interacting_blastwaves_1d/../../profiles/schemas/simulation.dip:5
Declaration: size float arepo_length
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:31
Modification: size = 1 arepo_length

Notes

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

simulation.time.begin

begin

EFFECTIVE VALUE0

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

Source history

Declared at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/schemas/simulation.dip:51
Declaration: begin float
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:36
Modification: begin = 0

Notes

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

simulation.time.coordinate

coordinate

EFFECTIVE VALUE"linear"

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/interacting_blastwaves_1d/../../profiles/schemas/simulation.dip:35
Declaration: coordinate str
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:33
Modification: coordinate = "linear"

Notes

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

simulation.time.end

end

EFFECTIVE VALUE0.038

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

Source history

Declared at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/schemas/simulation.dip:58
Declaration: end float
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:37
Modification: end = 1
Modified at: profile.dip:28
Modification: end = 0.038

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

Source history

Declared at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/schemas/simulation.dip:48
Declaration: final_redshift float
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:35
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/interacting_blastwaves_1d/../../profiles/schemas/simulation.dip:94
Declaration: first_snapshot float
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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 VALUE0

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

Source history

Declared at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/schemas/simulation.dip:45
Declaration: initial_redshift float
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:34
Modification: initial_redshift = 0

simulation.time.maximum_step

maximum step

EFFECTIVE VALUE0.019

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/interacting_blastwaves_1d/../../profiles/schemas/simulation.dip:66
Declaration: maximum_step float
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:38
Modification: maximum_step = 0.1
Modified at: profile.dip:29
Modification: maximum_step = 0.019

Notes

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

simulation.time.minimum_step

minimum step

EFFECTIVE VALUE1e-10

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/interacting_blastwaves_1d/../../profiles/schemas/simulation.dip:76
Declaration: minimum_step float
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:39
Modification: minimum_step = 1e-10

Notes

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

simulation.time.snapshot_interval

snapshot interval

EFFECTIVE VALUE0.038

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/interacting_blastwaves_1d/../../profiles/schemas/simulation.dip:101
Declaration: snapshot_interval float
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:42
Modification: snapshot_interval = 1
Modified at: profile.dip:31
Modification: snapshot_interval = 0.038

Notes

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

simulation.time.statistics_interval

statistics interval

EFFECTIVE VALUE0.019

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/interacting_blastwaves_1d/../../profiles/schemas/simulation.dip:85
Declaration: statistics_interval float
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../profiles/ideal_hydrodynamics.dip:40
Modification: statistics_interval = 0.005
Modified at: profile.dip:30
Modification: statistics_interval = 0.019

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/interacting_blastwaves_1d/../../profiles/schemas/simulation.dip:109
Declaration: timestep_criterion int
Modified at: projects/arepo/dipl/examples/interacting_blastwaves_1d/../../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/interacting_blastwaves_1d/DIPfile. Version: 0.9.3. The parameter values describe this bundled example; inspect a run's environment.diph5 to see overridden values.