Antares

A suite of 2D/3D Godunov codes

Introduction:

Antares（大火程序）is a hydrodynamical solver on an Eulerian grid, written in Fortran. It is a set of 2D/3D Godunov codes based on an exact/approximate Riemann solver. The development focuses on two versions:

MHD Cartesian solver in 2D/3D, with self-gravity. Single-level grid. MPI-parallel.
HD cylindrical/Cartesian solver in 1D/2D/3D. Multilevel grid with optional nested mesh refinement (NMR). MPI+OpenMP parallel.

Summary of Antares’s Approach:

HD/MHD solvers: Exactly Riemann solver, BGK solvers (gas kinematic scheme) for HD/MHD, HLL-type solvers for HD/MHD
Poisson solvers: kernel integral methods
Coordinates: Cartesian (2D/3D), cylindrical (2D/3D), logarithmic Cartesian (2D)
Grid configurations: uniform mesh, Adaptive mesh refinement (Cartesian 2D/3D), Nested mesh refinement (Cartesian/Cylindrical, 2D/3D)
Data format: HDF5
Parallelization: OpenMP, MPI
Boundary conditions: periodic, outgoing, user-defined

Application of the code:

Formation and kinematics of spiral disk galaxies, including M81, NGC 4945, NGC 1097, and NGC 6782.
Formation and evolution of circumplanetary disks (CPDs) in a globally 3D protoplanetary disk (PPD).
Orbital evolution of giant planets on self-gravitated PPDs.

Gallery

Gas distribution simulated for NGC 1097 (HD, Poisson) Lin et al. (2013)

Protoplanetary and circumplanetary disks (HD, NMR) Wang et al. (2014)

(a) Simulation results of M81; (b) Simulation overlaid with HI image; (c) Observed HI map and kinematics; (d) Simulation (color) overlaid with observed kinematics (black).