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PROJECT / AREPO

Arepo.

A massively parallel code for gravitational N-body and hydrodynamics simulations, including cosmological setups.

INTEGRATION External adapterHow SNT connectsSUPPORT IndependentUnofficialVALIDATION Settings parityWhat has been checked

Locally verified on 2026-10-10 with SNT3 0.9.3: 47 Arepo tests and 21 subtests passed against the pinned source, including recorded output plans. The mhd_shock_tube build and smoke run completed on macOS on 2026-10-09. Scientific-result validation and other platforms remain separate checks.

Project guide ↗DIPL integration ↗Original code ↗
Local workflowsnt hub fetch areposnt hub setup mhd_shock_tubesnt hub build --setup runs/mhd_shock_tubesnt hub run --setup runs/mhd_shock_tube
THE SCIENTIFIC CODE

About Arepo.

Arepo follows gas with an adaptive moving Voronoi mesh while also treating gravitationally interacting particles. It is used for problems with a wide range of spatial and time scales, including galaxy formation.

Why it belongs in the Hub

Its examples combine compile-time choices, runtime parameters, units, and initial-condition assets. That makes Arepo a useful test of whether one DIPL contract can expose scientifically meaningful controls while an adapter still produces the files the solver expects.

Explore the Arepo user guide ↗
EVALUATED DIPL MODELS

Parameter references.

Generated with SNT's Brief++ reporter from the DIPL projects in this pinned Hub bundle. Each report shows effective values, units, descriptions, source history, and schema details for one example.

16REPORTS
EXAMPLE / ALFVEN WAVE 1DAlfven Wave 1dNative inputs onlyEXAMPLE / COSMO ZOOM GRAVITY ONLY 3DCosmo Zoom Gravity Only 3dNative inputs onlyEXAMPLE / COSMOLOGICAL GRAVITY ONLYCosmological Gravity OnlyNative inputs onlyEXAMPLE / COSMOLOGICAL STAR FORMATIONCosmological Star FormationNative inputs onlyEXAMPLE / CURRENT SHEET 2DCurrent Sheet 2dNative inputs onlyEXAMPLE / GALAXY MERGER STAR FORMATION 3DGalaxy Merger Star Formation 3dNative inputs onlyEXAMPLE / GRESHO 2DGresho 2dNative inputs onlyEXAMPLE / INTERACTING BLASTWAVES 1DInteracting Blastwaves 1dNative inputs onlyEXAMPLE / ISOLATED GALAXY COLLISIONLESS 3DIsolated Galaxy Collisionless 3dNative inputs onlyEXAMPLE / MHD SHOCK TUBEMhd Shock TubeComplete setupEXAMPLE / NOH 2DNoh 2dNative inputs onlyEXAMPLE / NOH 3DNoh 3dNative inputs onlyEXAMPLE / POLYTROPE 1D SPHERICALPolytrope 1d SphericalNative inputs onlyEXAMPLE / SHOCKTUBE 1DShocktube 1dNative inputs onlyEXAMPLE / WAVE 1DWave 1dNative inputs onlyEXAMPLE / YEE 2DYee 2dNative inputs only

These reports describe the bundled example values. A personal run with --override-file can have different values; inspect its environment.diph5 or generate a report from that snapshot. Arepo source revision: 351aa8111a32e2e7433866bf8367ab7eba155d39.

This adapter records its resolved native mappings in each generated environment.diph5. The saved plan can be inspected and replayed without the original DIPL profile. Some projects still need their pinned source files for replay.