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A COMPARISON BETWEEN PML, INFINITE ELEMENTS AND AN ITERATIVE BEM AS MESH TRUNCATION METHODS FOR HP SELF-ADAPTIVE PROCEDURES IN ELECTROMAGNETICS

By I. Gomez-Revuelto, L. E. Garcia-Castillo, and L. F. Demkowicz

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Abstract:
Finite element hp-adaptivity is a technology that allows for very accurate numerical solutions. When applied to open region problems such as radar cross section prediction or antenna analysis, a mesh truncation method needs to be used. This paper compares the following mesh truncation methods in the context of hp-adaptive methods: Infinite Elements, Perfectly Matched Layers and an iterative boundary element based methodology. These methods have been selected because they are exact at the continuous level (a desirable feature required by the extreme accuracy delivered by the hp-adaptive strategy) and they are easy to integrate with the logic of hp-adaptivity. The comparison is mainly based on the number of degrees of freedom needed for each method to achieve a given level of accuracy. Computational times are also included. Two-dimensional examples are used, but the conclusions directly extrapolated to the three dimensional case.

Citation:
I. Gomez-Revuelto, L. E. Garcia-Castillo, and L. F. Demkowicz, "A Comparison Between PML, Infinite Elements and an Iterative BEM as Mesh Truncation Methods for Hp Self-Adaptive Procedures in Electromagnetics," Progress In Electromagnetics Research, Vol. 126, 499-519, 2012.
doi:10.2528/PIER12020201
http://www.jpier.org/PIER/pier.php?paper=12020201

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