Tree gauging in lossy high frequency FEM models

Gergely Koczka, Oszkar Biro

Publikation: KonferenzbeitragPaperBegutachtung

Abstract

Wave propagation problems involving both high conductivity materials and large non-conducting domains are solved in the frequency domain by the method of finite elements (FEM) using edge basis functions and applying the A,V-formulation. The singular matrix of the resulting algebraic equation system is regularized by tree gauging to facilitate its direct solution. It is shown that choosing a random tree can result in erroneous solutions even if a highly sophisticated sparse parallel direct equation system solver is used. This problem is overcome by generating the tree by a special algorithm taking account of the presence of high conductivity materials. Two numerical examples are investigated: an academic 1D wave propagation problem and a real-word 3D antenna.
Originalspracheenglisch
Seitenumfang2
PublikationsstatusVeröffentlicht - 2019
Veranstaltung22nd International Conference on the Computation of Electromagnetic Fields: COMPUMAG 2019 - Campus Pierre and Marie Curie of Sorbonne University, Paris, Frankreich
Dauer: 15 Juli 201919 Juli 2019
Konferenznummer: 22
https://www.compumag2019.com/
http://www.compumag.org/

Konferenz

Konferenz22nd International Conference on the Computation of Electromagnetic Fields
KurztitelCompumag 2019
Land/GebietFrankreich
OrtParis
Zeitraum15/07/1919/07/19
Internetadresse

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