Abstract
Microwave technology is widely used in different areas of advanced industry when energy must be provided to water-containing and other materials. The main barrier in the development of microwave devices is the possibility of efficient design by modelling a microwave system in a resonant state. For technical systems, the finite element method is widely used. However, the convergence process in the microwave finite element solver is sophisticated. The process itself and the influence of mesh granularity on the accuracy of modelling of microwave chambers in resonant states have not been investigated previously. The present paper aims to fill this gap. The resonance conditions of a microwave chamber were tested from the point of view of spatial resolution of the tetrahedral mesh used for open-source ELMER FEM software. The presented results experimentally determine the limits of accuracy of the geometry of microwave resonant chamber finite element method-based models. The determined values of microwave resonant chamber dimension tolerances should be considered for both open-source and commercial software for microwave modelling.
Highlights
The aim of this paper isare torectangular examine theand influence of mesh granularity on the accurahave any shape, but rectangular and cylindrical are most frequently used; the cy of FEM modelling of the resonant state in a microwave resonant chamber
Thepresented presentedresults resultsclearly clearlyindicate indicate that meshing granularity a strong
The that meshing granularity hmaxhmax has has a strong ininfluence on the results of electromagnetic field strength distribution on microwave fluence on the results of electromagnetic field strength H distribution on microwave chamberresonance
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Microwaves can be chamber, standing waves in occur, increasing amplitude. Increasing mesh granularity makes the simulation more sensitive memory resources This causes an unacceptably long time to be required to to numerical errors,on such that it requires the moreincreasing precise parameters of reality,makes which the are reach convergence a solution. Must a compromise aimgranularity, of this paperwhich is to examine theconnected influence with of mesh granularity on theand accuracy tweenThe mesh is directly calculation accuracy, time of FEM modelling of the resonant state in a microwave resonant chamber. The aim of this paper isare torectangular examine theand influence of mesh granularity on the accurahave any shape, but rectangular and cylindrical are most frequently used; the cy of FEM modelling of the resonant state in a microwave resonant chamber.
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