CASTRO: A New AMR Radiation-Hydrodynamics Code for Compressible Astrophysics

Details CASTRO: A New AMR Radiation-Hydrodynamics Code for Compressible Astrophysics CASTRO: A New AMR Radiation-Hydrodynamics Code for Compressible Astrophysics

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21547404a&link_type=abstract

American Astronomical Society, AAS Meeting #215, #474.04; Bulletin of the American Astronomical Society, Vol. 42, p.522

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CASTRO is a new, multi-dimensional, Eulerian AMR radiation-hydrodynamics code designed for astrophysical simulations. The code includes routines for various equations of state and nuclear reaction networks, and can be used with Cartesian, cylindrical or spherical coordinates. Time integration of the hydrodynamics equations is based on a higher-order, unsplit Godunov scheme. Self-gravity can be calculated on the adaptive hierarchy using a simple monopole approximation or a full Poisson solve for the potential. CASTRO includes gray and multigroup radiation diffusion. Multi-species neutrino diffusion for supernovae is nearing completion.
The adaptive framework of CASTRO is based on an time-evolving hierarchy of nested rectangular grids with refinement in both space and time; the entire implementation is designed to run on thousands of processors. We describe in more detail how CASTRO is implemented and can be used for a number of different simulations. Our initial applications of CASTRO include Type Ia and Type II supernovae.
This work has been supported by the SciDAC Program of the DOE Office of Mathematics, Information, and Computational Sciences under contracts No. DE-AC02-05CH11231 (LBNL), No. DE-FC02-06ER41438 (UCSC), and No. DE-AC52-07NA27344 (LLNL); and LLNL contracts B582735 and B574691(Stony Brook). Calculations shown were carried out on Franklin at NERSC.

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