Ramses

Ramses is a parallel adaptive mesh refinement code for astrophysical fluid dynamics. This code is a grid-based hydro solver with adaptive mesh refinement. The data structure is called a "fully threaded tree". As opposed to "patch-based AMR", cells are refined on a cell by cell basis: it is therefore called a "tree-based AMR". A very simple interface based on "Fortran namelists" can be used to specify runtime parameters. A few routines can be modified to set more complex initial or boundary conditions. The 4 main modules are:

• the AMR module with grid refinement, parallel communications and time stepping.
• the hydro module with a second-order unsplit Godunov solver with various slope limiters and Riemann solvers.
• the N body module for collisionless particles dynamics
• the Poisson module with a multigrid solver for the coarse grid and a Conjugate-Gradient solver on the fine grids.

Additionally a MHD module is downloadable as an add-on.