时域间断伽辽金-粒子模拟方法研究进展  

Research progress on discontinuous Galerkin time-domain particle-in-cell(DGTD-PIC)method

作　　者：陈再高[1] 齐红新 李炎培 任泽平 CHEN Zaigao;QI Hongxin;LI Yanpei;REN Zeping(National Key Laboratory of Intense Pulsed Radiation Simulation and Effect,Northwest Institute of Nuclear Technology,Xi’an 710024,China;Shanghai Key Laboratory of Magnetic Resonance,School of Physics and Electronic Science,East China Normal University,Shanghai 200240,China;School of Electronic Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]西北核技术研究所强脉冲辐射环境模拟与效应全国重点实验室,西安710024 [2]华东师范大学物理与电子科学学院上海市磁共振重点实验室,上海200240 [3]上海交通大学电子信息与电气工程学院,上海200240

出　　处：《电波科学学报》2024年第5期818-826,共9页Chinese Journal of Radio Science

基　　金：国家重点研发计划(2020YFA0709800)。

摘　　要：时域间断伽辽金-粒子模拟(discontinuous Galerkin time-domain particle-in-cell,DGTD-PIC)方法采用非结构网格能准确描述复杂结构,采用高阶基函数进一步提高了计算的精度,同时避免了求解大型逆矩阵,在等离子体和高功率电磁学相关数值模拟方面具有广泛的用途。近年来国内外报道了大量DGTD-PIC方面的研究工作,该方法在核心关键技术方面已取得了许多突破性进展。为促进DGTD-PIC方法的发展及应用,本文对该方法在修正势的DGTD电磁场计算方法、复频移完全匹配层边界、非结构网格中带电粒子定位与电荷和电流分配等关键技术方面所取得的研究成果进行了详细介绍。The discontinuous Galerkin time-domain particle-in-cell method(DGTD-PIC)has been studied extensively.By using unstructured meshes,this method can describe complex structures accurately.The higher-order basis functions can be adopted in the electromagnetic field calculation,and the accuracy of the results can be improved significantly.The DGTD-PIC method also has the merit of obtaining the simulation result without inversing large-scale matrices.So far,a large number of research results have been reported,many breakthroughs have been made in the key technologies of DGTD-PIC method.In order to promote the development and application of DGTD-PIC method,the up-to-date achievements of this method are introduced in details,including the purely hyperbolic Maxwell(PHM)equations,complex frequency shifted perfectly matched layer boundary,particle tracking,and current assignment.

关 键 词：等离子体模拟 时域间断伽辽金(DGTD)方法 有限元方法 全电磁粒子模拟算法 真空电子器件 

分 类 号：TN125[电子电信—物理电子学] O441[理学—电磁学]