Important Applications on the TF/SF Source and Grid Proportion for Explicit–Implicit Hybridizable Discontinuous Galerkin Time-Domain Method

0 ENGINEERING, ELECTRICAL & ELECTRONIC
Xing Li;Li Xu;Li Liao;Bin Li
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引用次数: 0

Abstract

Based on our previous research on the explicit-implicit hybridizable discontinuous Galerkin time-domain (ex-imHDGTD) method, this letter gives two important applications in time-domain multiscale electromagnetics. The first is that the different ratios of both coarse and refined meshes are discussed, which shows that grid division strategy has a significant effect on the performance of ex-imHDGTD. The second is that a total-field/scattered-field (TF/SF) method is derived to impose the excitation on interfaces instead of boundary faces. Compared with the traditional hybridizable discontinuous Galerkin (HDG) method, the introduction of TF/SF changes the formulations of both local and global linear systems. Once applying this TF/SF in ex-imHDGTD, it is very easy for 3-D waveguide problems to obtain the transmitted and reflected waves. Note that this is the first time the TF/SF is used in the ex-imHDGTD method. Numerical results show that the proposed applications are feasible due to higher computational performances.
显隐杂交间断伽辽金时域法中TF/SF源和网格比例的重要应用
本文基于前人对显式-隐式杂交间断伽辽金时域方法的研究,给出了时域多尺度电磁学中的两个重要应用。首先,讨论了粗网格和精网格的不同比例,表明网格划分策略对ex-imHDGTD的性能有显著影响。二是推导了一种全场/散射场(TF/SF)方法,将激发作用施加在界面上,而不是边界面上。与传统的杂化不连续伽辽金(HDG)方法相比,TF/SF的引入改变了局部和全局线性系统的表述。将这种TF/SF应用于前高分辨率差分波导中,可以很容易地获得三维波导问题中的透射波和反射波。注意,这是TF/SF第一次在ex-imHDGTD方法中使用。数值结果表明,该方法具有较高的计算性能,是可行的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
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