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| Paper: |
A Numerical Model for Multigroup Radiation Hydrodynamics |
| Volume: |
459, 6th International Conference of Numerical Modeling of Space Plasma Flows (ASTRONUM 2011) |
| Page: |
180 |
| Authors: |
Vaytet, N.; Audit, E.; Dubroca, B.; González, M. |
| Abstract: |
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. |
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