Year: 2019
Type: article
Abstract: We present a numerical implementation for the solution of the relativistic radiation hydrodynamics and magnetohydrodynamics equations, designed as an independent module within the freely available code PLUTO. The radiation transfer equations are solved under the gray approximation and imposing the M1 closure, which allows the radiation transport to be handled in both the free-streaming and diffusion limits. Equations are integrated following an implicit–explicit scheme, where radiation–matter interaction terms are integrated implicitly, whereas transport and all of the remaining source terms are solved explicitly by means of the same Godunov-type solvers included in PLUTO. Among these, we introduce a new Harten–Lax–van Leer–contact (HLLC) solver for optically thin radiation transport. The code is suitable for multidimensional computations in Cartesian, spherical, and cylindrical coordinates using either a single processor or parallel architectures. Adaptive grid computations are also made possible by means of the CHOMBO library. The algorithm performance is demonstrated through a series of numerical benchmarks by investigating various different configurations with a particular emphasis on the behavior of the solutions in the free-streaming and diffusion limits.
Authors: Julio David Melon Fuksman, Andrea Mignone
Language: English
Subfield: Computational Mechanics
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2924893200