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A matching of singularities in domain decomposition methods for reaction-diffusion problemswith discontinuous coefficients

Published online by Cambridge University Press:  15 April 2010

Chokri Chniti
Chokri Chniti*
Affiliation:
RICAM, Austrian Academy of Sciences, Altenberger strasse 69, 4040 Linz, Austria. chokri.chniti@ricam.oeaw.ac.at

Abstract

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In this paper we certify that the same approach proposed in previous works by Chniti et al. [C. R. Acad. Sci.342 (2006) 883–886; CALCOLO45 (2008) 111–147; J. Sci. Comput.38 (2009) 207–228] can be applied to more general operators with strong heterogeneity in the coefficients. We consider here the case of reaction-diffusion problems with piecewise constant coefficients. The problem reduces to determining the coefficients of some transmission conditionsto obtain fast convergence of domain decomposition methods.After explaining the theoretical results, we explicitly compute the coefficients in the transmission boundary conditions. The numerical results presented in this paper confirm the optimality properties.

Keywords

Corner singularitydomain decomposition methodKondratiev theory

Information

Type
Research Article
Information
ESAIM: Mathematical Modelling and Numerical Analysis , Volume 45 , Issue 1 , January 2011 , pp. 23 - 37
Copyright
© EDP Sciences, SMAI, 2010

References

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Chniti, C., Nataf, F. and Nier, F., Improved interface conditions for 2D domain decomposition with corners: Numerical applications. J. Sci. Comput. 38 (2009) 207–228. CrossRef
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