A domain decomposition analysis for a two-scale linear transport problem
ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Volume 37 (2003) no. 6, p. 869-892

We present a domain decomposition theory on an interface problem for the linear transport equation between a diffusive and a non-diffusive region. To leading order, i.e. up to an error of the order of the mean free path in the diffusive region, the solution in the non-diffusive region is independent of the density in the diffusive region. However, the diffusive and the non-diffusive regions are coupled at the interface at the next order of approximation. In particular, our algorithm avoids iterating the diffusion and transport solutions as is done in most other methods - see for example Bal-Maday (2002). Our analysis is based instead on an accurate description of the boundary layer at the interface matching the phase-space density of particles leaving the non-diffusive region to the bulk density that solves the diffusion equation.

DOI : https://doi.org/10.1051/m2an:2003059
Classification:  65N55,  82B40,  82B80,  82C40,  82C70,  76R50
Keywords: domain decomposition, transport equation, diffusion approximation, kinetic-fluid coupling
@article{M2AN_2003__37_6_869_0,
author = {Golse, Fran\c cois and Jin, Shi and Levermore, C. David},
title = {A domain decomposition analysis for a two-scale linear transport problem},
journal = {ESAIM: Mathematical Modelling and Numerical Analysis - Mod\'elisation Math\'ematique et Analyse Num\'erique},
publisher = {EDP-Sciences},
volume = {37},
number = {6},
year = {2003},
pages = {869-892},
doi = {10.1051/m2an:2003059},
zbl = {1078.65125},
mrnumber = {2026400},
language = {en},
url = {http://www.numdam.org/item/M2AN_2003__37_6_869_0}
}

Golse, François; Jin, Shi; Levermore, C. David. A domain decomposition analysis for a two-scale linear transport problem. ESAIM: Mathematical Modelling and Numerical Analysis - Modélisation Mathématique et Analyse Numérique, Volume 37 (2003) no. 6, pp. 869-892. doi : 10.1051/m2an:2003059. http://www.numdam.org/item/M2AN_2003__37_6_869_0/

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