Effective transmission conditions for domain decomposition methods applied to the time-harmonic curl-curl Maxwell's equations

Victorita Dolean, Martin J. Gander, Stephane Lanteri, Jin-Fa Lee, Zhen Peng

Research output: Contribution to journalArticle

34 Citations (Scopus)
107 Downloads (Pure)

Abstract

The time-harmonic Maxwell equations describe the propagation of electromagnetic waves and are therefore fundamental for the simulation of many modern devices we have become used to in everyday life. The numerical solution of these equations is hampered by two fundamental problems: first, in the high frequency regime, very fine meshes need to be used in order to avoid the pollution effect well known for the Helmholtz equation, and second the large scale systems obtained from the vector valued equations in three spatial dimensions need to be solved by iterative methods, since direct factorizations are not feasible any more at that scale. As for the Helmholtz equation, classical iterative methods applied to discretized Maxwell equations have severe convergence problems.We explain in this paper a family of domain decomposition methods based on well chosen transmission conditions. We show that all transmission conditions proposed so far in the literature, both for the first and second order formulation of Maxwell's equations, can be written and optimized in the common framework of optimized Schwarz methods, independently of the first or second order formulation one uses, and the performance of the corresponding algorithms is identical. We use a decomposition into transverse electric and transverse magnetic fields to describe these algorithms, which greatly simplifies the convergence analysis of the methods. We illustrate the performance of our algorithms with large scale numerical simulations.

Original languageEnglish
Pages (from-to)232-247
Number of pages16
JournalJournal of Computational Physics
Volume280
Early online date8 Oct 2014
DOIs
Publication statusPublished - 1 Jan 2015

Keywords

  • Maxwell equations
  • optimized Schwarz methods
  • transmission conditions

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