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An efficient approach for computing scattering by inhomogeneous objects with thin dielectric structures
Author(s) -
Yang MingLin,
Sun XuMin,
Gao HongWei,
Song Wei,
Sheng XinQing
Publication year - 2016
Publication title -
international journal of numerical modelling: electronic networks, devices and fields
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 30
eISSN - 1099-1204
pISSN - 0894-3370
DOI - 10.1002/jnm.2147
Subject(s) - multipole expansion , preconditioner , computation , dielectric , scattering , computational science , inverse , computer science , boundary (topology) , algorithm , mathematics , materials science , geometry , mathematical analysis , physics , optics , optoelectronics , iterative method , quantum mechanics
Summary This paper incorporates the compensated Mitzner boundary conditions (CMBC) into the hybrid finite element‐ boundary integral‐multilevel fast multipole algorithm (FE‐BI‐MLFMA) for fast and accurate computation of scattering by three‐dimensional inhomogeneous objects with thin dielectric structures. In this CMBC‐FE‐BI‐MLFMA, each thin dielectric layer is reduced to an interface with zero thickness; then CMBC is applied to establish the relation of electromagnetic fields across the interfaces. This approach can reduce the amount of computation and remain the advantages of versatility, accuracy, and efficiency of the conventional FE‐BI‐MLFMA algorithm. The formulation of this CMBC‐FE‐BI‐MLFMA is presented in this paper. An efficient preconditioner based on the sparse approximate inverse is employed and further parallelized on memory‐distributed platforms. Numerical results are presented to demonstrate the accuracy, efficiency, and capability of the parallel CMBC‐FE‐BI‐MLFMA. Copyright © 2016 John Wiley & Sons, Ltd.