A Modification technique of Collision Probability in the Direct Simulation Monte Carlo Method

摘要：

　　In Direct Simulation Monte Carlo(DSMC)method,it is difficulty to keep grid size smaller than local mean free path,that influences calculation accuracy much.In this paper,a new modification technique of collision probability with least square method and sub-relaxation technique is introduced to improve simulation accuracy in DSMC with coarse grid size.The new method is applied to direct simulation Monte Carlo method based on unstructured tetrahedral cells,which can be easily used for other grid topology.A numerical example with different grid size is implemented to validate the method discussed here,and the numerical results confirm feasibility of the modification technique.

关键词： DSMC Unstructured grid Collision probability correction Least square method

作者: Huang Fei Li Pengfei Jin Xu-hong Liu Xiaowen Cheng Xiaoli

作者单位: China Academy of Aerospace Aerodynamics,Beijing 100074,China

会议类型: 国际会议

会议名称: 2014 Asia-Pacific International Symposium on Aerospace Technology(2014亚太航空航天技术学术会议)

会议地点: 上海

会议语种:英文

页码: 1-7

在线出版日期: 2014-09-24（万方平台首次上网日期，不代表论文的发表时间）