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A robust two-level domain decomposition preconditioner for systems of PDEs


Reference:

Spillane, N., Dolean, V., Hauret, P., Nataf, F., Pechstein, C. and Scheichl, R., 2011. A robust two-level domain decomposition preconditioner for systems of PDEs. Comptes Rendus Mathematique, 349 (23-24), pp. 1255-1259.

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Official URL:

http://dx.doi.org/10.1016/j.crma.2011.10.021

Abstract

Coarse spaces are instrumental in obtaining scalability for domain decomposition methods. However, it is known that most popular choices of coarse spaces perform rather weakly in presence of heterogeneities in the coefficients in the partial differential equations, especially for systems. Here, we introduce in a variational setting a new coarse space that is robust even when there are such heterogeneities. We achieve this by solving local generalized eigenvalue problems which isolate the terms responsible for slow convergence. We give a general theoretical result and then some numerical examples on a heterogeneous elasticity problem.

Details

Item Type Articles
CreatorsSpillane, N., Dolean, V., Hauret, P., Nataf, F., Pechstein, C. and Scheichl, R.
DOI10.1016/j.crma.2011.10.021
DepartmentsFaculty of Science > Mathematical Sciences
RefereedYes
StatusPublished
ID Code28433

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