Physics – Computational Physics
Scientific paper
2008-04-09
Comput. Sci. Disc. 1 (2008) 015005
Physics
Computational Physics
submitted to Computational Science and Discovery
Scientific paper
10.1088/1749-4699/1/1/015005
We describe RAGE, the ``Radiation Adaptive Grid Eulerian'' radiation-hydrodynamics code, including its data structures, its parallelization strategy and performance, its hydrodynamic algorithm(s), its (gray) radiation diffusion algorithm, and some of the considerable amount of verification and validation efforts. The hydrodynamics is a basic Godunov solver, to which we have made significant improvements to increase the advection algorithm's robustness and to converge stiffnesses in the equation of state. Similarly, the radiation transport is a basic gray diffusion, but our treatment of the radiation-material coupling, wherein we converge nonlinearities in a novel manner to allow larger timesteps and more robust behavior, can be applied to any multi-group transport algorithm.
Betlach Thomas
Byrne Nelson
Clover Michael
Coker Robert
Dendy Edward
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