期刊
MATHEMATICAL MODELS & METHODS IN APPLIED SCIENCES
卷 11, 期 5, 页码 749-767出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0218202501001082
关键词
radiative heat transfer; asymptotic analysis; nonlinear diffusion limit; Milne problem; asymptotic preserving methods; numerical methods for stiff equations
Radiative heat transfer equations including heat conduction are considered in the small mean free path limit. Rigorous results on the asymptotic procedure leading to the equilibrium diffusion equation for the temperature are given. Moreover, the nonlinear Milne problem describing the boundary layer is investigated and an existence result is proven. An asymptotic preserving scheme for the radiative transfer equations with the diffusion scaling is developed. The scheme is based on the asymptotic analysis. It works uniformly for all ranges of mean free paths. Numerical results for different physical situations are presented.
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