Coupled FDTD-FEM approach to modelling of microwave heating process
Coupled FDTD-FEM approach to modelling of microwave heating process
- Author(s):
- DOI: 10.1049/cp:20040496
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- Author(s): Source: Fifth IEE International Conference on Computation in Electromagnetics - CEM 2004, 2004 p. 171 – 172
- Conference: Fifth IEE International Conference on Computation in Electromagnetics - CEM 2004
- DOI: 10.1049/cp:20040496
- ISBN: 0 86341 400 1
- Location: Stratford-upon-Avon, UK
- Conference date: 19-22 April 2004
- Format: PDF
Commercial packages often lack the features that are crucial to ensure high accuracy of simulations of processes like microwave heating. One of such features is taking into account the heat transfer effect that can radically change the calculated distribution of temperature within the heated object. In the paper we describe a method of conducting a coupled simulation of microwave heating process using two numerical algorithms that have proven to be most effective in electromagnetic and thermal simulations. The conformal FDTD algorithm successfully employed in microwave circuit simulations is responsible to handle the electromagnetic part while the thermal solver uses FEM method which is by far the most wide-spread approach in thermal problems. Because these two methods use different discretization schemes an additional interpolation needs to be applied before the results obtained from one of them can be used by the other. A few interpolation algorithms have been considered and the best one in terms of minimizing the number of interpolation operations and the resulting loss of accuracy is chosen.
Inspec keywords: finite difference time-domain analysis; microwave circuits; finite element analysis; interpolation; microwave heating
Subjects: Microwave circuits and devices; Process heating; Interpolation and function approximation (numerical analysis); Finite element analysis; Other numerical methods
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