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Article Dans Une Revue Numerical modeling of space plasma flows (astronum 2011). Proceedings of a 6th internation conference held at Velancia Année : 2012

A Numerical Model for Multigroup Radiation Hydrodynamics

Résumé

We present in this paper a multigroup model for radiation hydrodynamics to account for variations of the gas opacity as a function of frequency. The entropy closure model (M1) is applied to multigroup radiation transfer in a radiation hydrodynamics code. In difference from the previous grey model, we are able to reproduce the crucial effects of frequency-variable gas opacities, a situation omnipresent in physics and astrophysics. We also account for the energy exchange between neighbouring groups which is important in flows with strong velocity divergence. We presents some test problems as well as realistic frequency-dependent simulations of radiative shocks.

Dates et versions

hal-00765980 , version 1 (17-12-2012)

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N. Vaytet, E. Audit, B. Dubroca, M. González. A Numerical Model for Multigroup Radiation Hydrodynamics. Numerical modeling of space plasma flows (astronum 2011). Proceedings of a 6th internation conference held at Velancia, 2012, 459, pp.180. ⟨hal-00765980⟩
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