Characteristic Variables-Physical Boundary(CV-PB) Matching Condition for Interfaces in Multidomain Pseudospectral Time-Domain

JIANG Yong-jin; CHAI Shun-lian; MAO Jun-jie

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Characteristic Variables-Physical Boundary(CV-PB) Matching Condition for Interfaces in Multidomain Pseudospectral Time-Domain

更新时间：2025-07-16

- Characteristic Variables-Physical Boundary(CV-PB) Matching Condition for Interfaces in Multidomain Pseudospectral Time-Domain
- Acta Electronica Sinica Vol. 33, Issue 12, Pages: 2226-2230(2005)
- 作者机构：
  
  国防科技大学电子科学与工程学院,湖南,长沙,410073
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN820.1
- Published：2005
- 稿件说明：
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JIANG Yong-jin, CHAI Shun-lian, MAO Jun-jie. Characteristic Variables-Physical Boundary(CV-PB) Matching Condition for Interfaces in Multidomain Pseudospectral Time-Domain[J]. Acta Electronica Sinica, 2005, 33(12): 2226-2230.
DOI：

JIANG Yong-jin, CHAI Shun-lian, MAO Jun-jie. Characteristic Variables-Physical Boundary(CV-PB) Matching Condition for Interfaces in Multidomain Pseudospectral Time-Domain[J]. Acta Electronica Sinica, 2005, 33(12): 2226-2230. DOI：

摘要

针对多域伪谱时域算法(MPSTD)中子域分界面两侧为不同介质的情形

将特征变量法与物理边界条件相结合提出一种新的子域分界面匹配条件:特征变量-物理边界(CV-PB)匹配条件

并推导得到一般3D曲线坐标系中子域分界面上的场值更新关系.最后给出的数值实例将其与传统分界面匹配条件在算法稳定性、计算精度方面做了比较.多种情形下的数值仿真表明

该匹配条件比传统匹配条件的数值稳定性更好、精度更高.

Abstract

Characteristic variables-Physical boundary(CV-PB) matching condition is proposed for the interfaces which separate two subdomains with different materials in multidomain PSTD

and interface field update relations are obtained in the 3-D generalized curvilinear coordinates.Some numerical examples are used to compare the CV-PB with the traditional matching condition.The numerical results show that the proposed matching condition is more stable and accurate than the traditional matching condition.

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