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Convergence and stability of a discontinuous Galerkin time-domain method for the 3D heterogeneous Maxwell equations on unstructured meshes

Published online by Cambridge University Press:  15 November 2005

Loula Fezoui ,
Stéphane Lanteri ,
Stéphanie Lohrengel  and
Serge Piperno
Loula Fezoui
Affiliation:
CERMICS, INRIA, BP93, 06902 Sophia-Antipolis Cedex, France. [email protected]
Stéphane Lanteri
Affiliation:
CERMICS, INRIA, BP93, 06902 Sophia-Antipolis Cedex, France. [email protected]
Stéphanie Lohrengel
Affiliation:
Dieudonné Lab., UNSA, UMR CNRS 6621, Parc Valrose, 06108 Nice Cedex 2, France.
Serge Piperno
Affiliation:
CERMICS, INRIA, BP93, 06902 Sophia-Antipolis Cedex, France. [email protected]
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Abstract

A Discontinuous Galerkin method is used for to thenumerical solution of the time-domain Maxwell equations onunstructured meshes. The method relies on the choice of local basisfunctions, a centered mean approximation for the surface integralsand a second-order leap-frog scheme for advancing in time. The methodis proved to be stable for cases with either metallic or absorbingboundary conditions, for a large class of basis functions. A discrete analog of the electromagnetic energy is conserved formetallic cavities. Convergence is proved for $\mathbb{P}_k$ Discontinuous elements on tetrahedral meshes, as well as a discretedivergence preservation property. Promising numerical examples withlow-order elements show the potential of the method.

Keywords

Electromagneticsfinite volume methodsdiscontinuousGalerkin methodscentered fluxesleap-frog time schemeL 2 stabilityunstructured meshesabsorbing boundaryconditionconvergencedivergence preservation.
Type
Research Article
Information
ESAIM: Mathematical Modelling and Numerical Analysis , Volume 39 , Issue 6 , November 2005 , pp. 1149 - 1176
Copyright
© EDP Sciences, SMAI, 2005

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