A hybrid technique for computing the power distribution generated in a lossy medium during microwave heating

Vegh, V. and Turner, I. W. (2006) A hybrid technique for computing the power distribution generated in a lossy medium during microwave heating. Journal of Computational and Applied Mathematics, 197 1: 122-140.


Author Vegh, V.
Turner, I. W.
Title A hybrid technique for computing the power distribution generated in a lossy medium during microwave heating
Journal name Journal of Computational and Applied Mathematics   Check publisher's open access policy
ISSN 0377-0427
Publication date 2006-12-01
Sub-type Article (original research)
DOI 10.1016/j.cam.2005.10.031
Volume 197
Issue 1
Start page 122
End page 140
Total pages 19
Editor M. J. Goovaerts
Place of publication Amsterdam, Netherlands
Publisher Elsevier Science BV
Collection year 2006
Language eng
Subject CX
C1
230108 Harmonic and Fourier Analysis
671401 Scientific instrumentation
0102 Applied Mathematics
0103 Numerical and Computational Mathematics
0802 Computation Theory and Mathematics
Formatted abstract Over the years researchers in the field of computational electromagnetics (CEM) have investigated and explored a number of different techniques to resolve electromagnetic fields inside waveguide and cavity structures. The equations that govern the fundamental behaviour of electromagnetic wave propagation in such structures are Maxwell's equations. In the literature, a number of different techniques have been employed to solve these equations and out of these methods, the classical finite-difference time-domain (FD-TD) scheme, which uses a staggered time and space discretisation, is the most well-known and widely used. However, this scheme is complicated to implement on an irregular computational domain using unstructured meshes.

This research work builds upon previous work undertaken for a waveguide, where a coupled method was introduced for the solution of the governing electromagnetic equations. In that work, the free-space component of the solution was computed in the time-domain, whilst the power distribution in the load was resolved using the frequency dependent electric field Helmholtz equation. This methodology resulted in a time-frequency domain hybrid scheme. In this paper, the hybrid method has been tested further for both waveguide and cavity configurations that are loaded with a lossy dielectric material. Numerical tests highlight both the accuracy and computational efficiency of the proposed hybrid strategy for predicting the power distribution generated during microwave heating processes. The accuracy of the hybrid scheme is gauged by direct comparison with the FD-TD numerical solutions and previously published thermal images.
© 2005 Elsevier B.V. All rights reserved.
Keyword CEM
DFT
Hybrid
Helmholtz
Maxwell
Mathematics, Applied
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Centre for Advanced Imaging Publications
 
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Created: Wed, 15 Aug 2007, 08:17:54 EST