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.
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.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2005年第12期2226-2230,共5页
Acta Electronica Sinica
关键词
多域伪谱时域算法
子域分界面匹配条件
特征变量.物理边界(CV-PB)匹配条件
multidomain pseudospectral time-domain（MPSTD）
matching condition for interfaces of subdomains
characteristicvariables-Physical boundary（CV-PB）
