Analysis of electromagnetic/thermal coupling of Debye media using HIE-FDTD method

Wenbin Yan, Qunsheng Cao and Yi Wang

Journal of Electromagnetic Waves and Applications, 2023, vol. 37, issue 10-12, 939-949

Abstract: In this paper, the multi-physical working mechanism of the Debye dispersive media is studied in detail, and the coupling analysis of Maxwell's and heat conduction equations is carried out. The hybrid-implicit-explicit finite difference time domain (HIE-FDTD) method is applied to accelerate calculation of the electromagnetic(EM). The Debye model, introduced to HIE-FDTD through the auxiliary difference equation (ADE) technique by utilizing polarization current, describes the dispersion characteristics of a water-based absorber. In addition, a new expression of transient power loss density is proposed with the polarization current, which overcomes the negative power loss in the traditional method and makes the computation more accurate. Finally, the analysis proves that the ADE-HIE-FDTD method has good performance in the EM-thermal coupling calculation, and the absorption rate of the absorber shows the interaction effect between temperature distribution and dielectric material.

Date: 2023
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DOI: 10.1080/09205071.2023.2216393

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