A∞ and AN formulations of the linear transport equation in heterogeneous media
2016
Abstract The aim of the paper is to provide a contribution for the extension to heterogeneous media of the A ∞ and A N formulations for the linear transport equation. A new approach is proposed, in which the exponential of the optical length is decomposed in a sum of pure exponential terms, as in a homogeneous medium; in this way, a set of coupled diffusion-like equations is obtained. Different approximations are presented and their validity is discussed.
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