NUMERICAL RESOLUTION OF AN ANISOTROPIC NON-LINEAR DIFFUSION PROBLEM *
Langue
en
Article de revue
Ce document a été publié dans
Communications in Mathematical Sciences. 2015
International Press
Résumé en anglais
This paper is devoted to the numerical resolution of an anisotropic non-linear diffusion problem involving a small parameter ǫ, defined as the anisotropy strength reciprocal. In this work, the anisotropy is carried by a ...Lire la suite >
This paper is devoted to the numerical resolution of an anisotropic non-linear diffusion problem involving a small parameter ǫ, defined as the anisotropy strength reciprocal. In this work, the anisotropy is carried by a variable vector function b. The equation being supplemented with Neumann boundary conditions, the limit ǫ → 0 is demonstrated to be a singular perturbation of the original diffusion equation. To address efficiently this problem, an Asymptotic-Preserving scheme is derived. This numerical method does not require the use of coordinates adapted to the anisotropy direction and exhibits an accuracy as well as a computational cost independent of the anisotropy strength.< Réduire
Mots clés en anglais
Anisotropic diffusion problems
Singular perturbation
Asymptotic-Preserving schemes AMS Subject Classification: 35J60
35J62
65M06
65M12
65N06
65N12
Origine
Importé de halUnités de recherche