Radiative Heat Transfer and Effective Transport Coefficients

Details Radiative Heat Transfer and Effective Transport Coefficients Radiative Heat Transfer and Effective Transport Coefficients

2010-09-16

arxiv.org/abs/1009.3131v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

The theory of heat transfer by electromagnetic radiation is based on the radiative transfer equation (RTE) for the radiation intensity, or equivalently on the Boltzmann transport equation (BTE) for the photon distribution. We focus in this review article, after a brief overview on different solution methods, on a recently introduced approach based on truncated moment expansion. Due to the linearity of the underlying BTE, the appropriate closure of the system of moment equations is entropy production rate minimization. This closure provides a distribution function and the associated effective transport coefficients, like mean absorption coefficients and the Eddington factor, for an arbitrary number of moments. The moment approach is finally illustrated with an application of the two-moment equations to an electrical arc.

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