涡判据在孔腔涡旋流动拓扑结构分析中的应用

摘要

Vortex which is a classical flow pattern has not a strict mathematical definition so far, and vortex identification is still an important approach to distinguish them. Different vortex identifications and physical meaning are summarized in this paper as well as the Q and λ2 identifications are employed to distinguish the actual various vortices in the cavity and analyze the topologic structure of vortices, the good results are obtained.%涡作为一种经典的流动现象目前仍没有严格的数学定义,涡判据是人们识别涡的重要途径.文章对涡的各种判据及其物理意义进行了调研和总结,并将目前较为常用的Q判据和λ2判据应用于二维和三维孔腔流动中涡的识别,并对其拓扑结构进行了分析,得到了有意义的结果.