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CASTRO: A New Compressible Astrophysical Solver. II. Gray Radiation Hydrodynamics

Author(s): Zhang, W; Howell, L; Almgren, A; Burrows, Adam S.; Bell, J

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Abstract: We describe the development of a flux-limited gray radiation solver for the compressible astrophysics code, CASTRO. CASTRO uses an Eulerian grid with block-structured adaptive mesh refinement based on a nested hierarchy of logically rectangular variable-sized grids with simultaneous refinement in both space and time. The gray radiation solver is based on a mixed-frame formulation of radiation hydrodynamics. In our approach, the system is split into two parts, one part that couples the radiation and fluid in a hyperbolic subsystem, and another parabolic part that evolves radiation diffusion and source–sink terms. The hyperbolic subsystem is solved explicitly with a high-order Godunov scheme, whereas the parabolic part is solved implicitly with a first-order backward Euler method.
Publication Date: Oct-2011
Electronic Publication Date: 30-Sep-2011
Citation: Zhang, W, Howell, L, Almgren, A, Burrows, A, Bell, J. (2011). CASTRO: A New Compressible Astrophysical Solver. II. Gray Radiation Hydrodynamics. The Astrophysical Journal Supplement Series, 196 (20 - 20. doi:10.1088/0067-0049/196/2/20
DOI: doi:10.1088/0067-0049/196/2/20
Type of Material: Journal Article
Journal/Proceeding Title: The Astrophysical Journal Supplement Series
Version: Final published version. This is an open access article.

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