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A discontinuous Galerkin Trefftz type method for solving the two dimensional Maxwell equations

Håkon Sem Fure 1 Sébastien Pernet 1 Margot Sirdey 1 Sébastien Tordeux 2
2 Magique 3D - Advanced 3D Numerical Modeling in Geophysics
LMAP - Laboratoire de Mathématiques et de leurs Applications [Pau], Inria Bordeaux - Sud-Ouest
Abstract : Trefftz methods are known to be very efficient to reduce the numerical pollution when associated to plane wave basis. However, these local basis functions are not adapted to the computation of evanescent modes or corner singularities. In this article, we consider a two dimensional time-harmonic Maxwell system and we propose a formulation which allows to design an electromagnetic Trefftz formulation associated to local Galerkin basis computed thanks to an auxiliary Nédélec finite element method. The results are illustrated with numerous numerical examples. The considered test cases reveal that the short range and long range propagation phenomena are both well taken into account.
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Håkon Sem Fure, Sébastien Pernet, Margot Sirdey, Sébastien Tordeux. A discontinuous Galerkin Trefftz type method for solving the two dimensional Maxwell equations. SN Partial Differential Equations and Applications, Springer, 2020, 1 (23), pp.19. ⟨10.1007/s42985-020-00024-0⟩. ⟨hal-02899350⟩

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