A domain decomposition preconditioner for an advection-diffusion problem

Abstract

We propose a generalization of the Neumann-Neumann algorithm for advection-diffusion problems: the Neumann conditions are replaced by suitable Robin conditions. The method is first introduced and analysed in the case where the domain is partitioned into vertical strips, then generalized to an arbitrary decomposition. A coarse space procedure is proposed. Finally, numerical results for bidimensional and tridimensional tests are given. (C) 2000 Elsevier Science S.A. All rights reserved.