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ASEG Extended Abstracts ASEG Extended Abstracts Society
ASEG Extended Abstracts
RESEARCH ARTICLE

High-Frequency Three-Dimensional Electromagnetic Modeling Using Vector Finite Elements

Jeong-Sul Son, Yoonho Song and Jung Hee Suh

ASEG Special Publications 2003(1) 1 - 9
Published: 2003

Abstract

We have developed a three-dimensional electromagnetic (EM) modeling algorithm using vector finite elements. Modeling of the EM field using the finite element method (FEM) has the problem of spurious solutions, the so-called `vector parasite', originating from the discontinuity of normal electric fields at boundaries. We use vector elements to eliminate this vector parasite problem seen in nodal formulations. To verify the developed 3-D EM modeling algorithm, we compare the results for a layered-earth model with the analytic solution. As expected, the vector based FEM model developed in this study does not have any vector parasite problem. We used a frequency of 100 MHz to test the applicability of our program to the simulation of high frequency EM surveys. Fields calculated for a model with a dielectric anomaly are well matched with the layered-earth ones. Finally we applied our algorithm to a model with a purely dielectric anomaly, and investigate the behavior of field through 3D vector plots.

https://doi.org/10.1071/ASEG2003_3DEMab019

© ASEG 2003

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