等离子鞘套电磁仿真网格前处理  

Plasma Sheath Electromagnetic Simulation Mesh Pretreatment

作　　者：丁策 王涵 林海[1] DING Ce;WANG Han;LIN Hai(State Key Laboratory of CAD&CG,Zhejiang University,Hangzhou 310058,Zhejiang,China)

机构地区：[1]浙江大学CAD&CG国家重点实验室,浙江杭州310058

出　　处：《空天防御》2023年第4期58-63,共6页Air & Space Defense

基　　金：国家重点研发计划(2020YFC2201302)。

摘　　要：在研究等离子鞘套的电磁特性时,需要在仿真计算出的流场数据中计算出空气电离程度,得到流场网格下的各顶点的介电常数。进行电磁计算时,由于该套网格过于疏密而且四面体单元不均匀,计算平台无法计算,需要进行网格简化。针对相对于计算平台密集的网格数量和网格分布的跨尺度不均匀的问题,本文提出一种基于蒙特卡洛随机算法的网格简化方法。相较于目前已有的四面体网格简化方法,本方法简单易用,时间复杂度为O(N)(N为顶点个数),空间复杂度为O(N)。The electromagnetic characteristics of an ionized gas layer are crucial to measure the degree of air ionization in the simulation-calculated flow field and to obtain the dielectric constant of each vertex under the flow field mesh.In electromagnetic computation,the calculation platform cannot operate if the mesh is too dense or the tetrahedral elements are not uniform,therefore the mesh must be simplified.This work has developed a Monte Carlo stochastic algorithm-based method for mesh simplification to resolve the problem when the number of mesh is higher than the computing platform or their distribution across scales is uneven.Compared to previous simplification methods,the proposed method is straightforward and user-friendly,with a time complexity of O(N)(where N is the number of vertices)and a space complexity of O(N).

关 键 词：网格简化 参数迁移 K-D树 蒙特卡洛算法 

分 类 号：V443.2[航空宇航科学与技术—飞行器设计]