This paper deals with the diffusion limit of a kinetic equation where the collisions are modeled by a Lorentz type operator. The main aim is to construct a discrete scheme to approximate this equation which gives for any value of the Knudsen number, and in particular at the diffusive limit, the right discrete diffusion equation with the same value of the diffusion coefficient as in the continuous case. We are also naturally interested with a discretization which can be used with few velocity discretization points, in order to reduce the cost of computation.
Mots clés : Hilbert expansion, diffusion limit
@article{M2AN_2002__36_4_631_0, author = {Buet, Christophe and Cordier, St\'ephane and Lucquin-Desreux, Brigitte and Mancini, Simona}, title = {Diffusion limit of the {Lorentz} model : asymptotic preserving schemes}, journal = {ESAIM: Mod\'elisation math\'ematique et analyse num\'erique}, pages = {631--655}, publisher = {EDP-Sciences}, volume = {36}, number = {4}, year = {2002}, doi = {10.1051/m2an:2002028}, mrnumber = {1932307}, zbl = {1062.82050}, language = {en}, url = {http://www.numdam.org/articles/10.1051/m2an:2002028/} }
TY - JOUR AU - Buet, Christophe AU - Cordier, Stéphane AU - Lucquin-Desreux, Brigitte AU - Mancini, Simona TI - Diffusion limit of the Lorentz model : asymptotic preserving schemes JO - ESAIM: Modélisation mathématique et analyse numérique PY - 2002 SP - 631 EP - 655 VL - 36 IS - 4 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/m2an:2002028/ DO - 10.1051/m2an:2002028 LA - en ID - M2AN_2002__36_4_631_0 ER -
%0 Journal Article %A Buet, Christophe %A Cordier, Stéphane %A Lucquin-Desreux, Brigitte %A Mancini, Simona %T Diffusion limit of the Lorentz model : asymptotic preserving schemes %J ESAIM: Modélisation mathématique et analyse numérique %D 2002 %P 631-655 %V 36 %N 4 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/m2an:2002028/ %R 10.1051/m2an:2002028 %G en %F M2AN_2002__36_4_631_0
Buet, Christophe; Cordier, Stéphane; Lucquin-Desreux, Brigitte; Mancini, Simona. Diffusion limit of the Lorentz model : asymptotic preserving schemes. ESAIM: Modélisation mathématique et analyse numérique, Tome 36 (2002) no. 4, pp. 631-655. doi : 10.1051/m2an:2002028. http://www.numdam.org/articles/10.1051/m2an:2002028/
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