Multifrequency-Gray Method for Radiation Diffusion with Compton Scattering

Author: Winslow A.M.  

Publisher: Academic Press

ISSN: 0021-9991

Source: Journal of Computational Physics, Vol.117, Iss.2, 1995-03, pp. : 262-273

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Abstract

We describe an improved multifrequency-gray method for time-dependent nonequilibrium flux-limited radiation diffusion in a high temperature system, using a two-temperature model for electrons and ions and including energy exchange between photons and electrons by Compton scattering. Our gray equation has a nonsymmetric finite difference matrix that allows us to represent negative gray diffusion coefficients, which occur in the presence of a "green-house" effect, in a numerically stable manner. Numerical results are presented.