Une méthode de décomposition de domaine à deux niveaux basée sur l'opérateur de Steklov-Poincaré

Translated title of the contribution: A two level domain decomposition preconditioner based on local Dirichlet-to-Neumann maps

Frédéric Nataf, Hua Xiang, Victorita Dolean

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

Coarse grid correction is a key ingredient in order to have scalable domain decomposition methods. In this Note we construct the coarse grid space using the low frequency modes of the subdomain DtN (Dirichlet-Neumann) maps, and apply the obtained two-level preconditioner to the linear system arising from an overlapping domain decomposition. Our method is suitable for the parallel implementation and its efficiency is demonstrated by numerical examples on problems with high heterogeneities.

Translated title of the contributionA two level domain decomposition preconditioner based on local Dirichlet-to-Neumann maps
Original languageFrench
Pages (from-to)1163-1167
Number of pages5
JournalComptes Rendus Mathematique
Volume348
Issue number21-22
Early online date30 Oct 2010
DOIs
Publication statusPublished - 30 Nov 2010

Keywords

  • coarse grid correction
  • domain decomposition methods
  • low frequency modes

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