CASTRO: A New Compressible Astrophysical Solver. III. Multigroup Radiation Hydrodynamics

Abstract

We present a formulation for multigroup radiation hydrodynamics that is correct to order $O(v/c)$ using the comoving-frame approach and the flux-limited diffusion approximation. We describe a numerical algorithm for solving the system, implemented in 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. In our multigroup radiation solver, the system is split into three parts, one part that couples the radiation and fluid in a hyperbolic subsystem, another part that advects the radiation in frequency space, and a parabolic part that evolves radiation diffusion and source-sink terms. The hyperbolic subsystem and the frequency space advection are solved explicitly with high-order Godunov schemes, whereas the parabolic part is solved implicitly with a first-order backward Euler method. Our multigroup radiation solver works for both neutrino and photon radiation.

accepted by ApJS, 27 pages, 20 figures, high-resolution version available at https://ccse.lbl.gov/Publications/wqzhang/castro3.pdf

References in corpus (4)

• Delayed neutrino-driven supernova explosions aided by the standing accretion-shock instability
• The RAGE radiation-hydrodynamic code
• Features of the Acoustic Mechanism of Core-Collapse Supernova Explosions
• Equations and Algorithms for Mixed Frame Flux-Limited Diffusion Radiation Hydrodynamics

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