A Time-Domain FEM-BEM Iterative Coupling Algorithm to Numerically Model the Propagation of Electromagnetic Waves
Delfim Soares Jr.

doi:10.3970/cmes.2008.032.057
Source CMES: Computer Modeling in Engineering & Sciences, Vol. 32, No. 2, pp. 57-68, 2008
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Keywords Finite Elements; Boundary Elements; Time-Domain Analysis; Iterative Coupling; Electromagnetic Waves.
Abstract In this work, a time-domain finite element -- boundary element iterative coupling technique is presented in order to analyse electromagnetic scattering from two-dimensional inhomogeneous objects. In the iterative coupling algorithm, the domain of the original problem is subdivided into sub-domains and each sub-domain is analysed independently (as an uncoupled model) taking into account successive renewals of variables at common interfaces. In order to improve the effectiveness of the iterative coupling approach, the evaluation of an optimised relaxation parameter is discussed, taking into account the minimisation of a square error functional. The algorithm that arises is efficient, accurate and flexible. At the end of the paper, numerical examples are presented, illustrating the potentialities of the proposed methodology.
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