报告题目：Hermite Spectral Method for Multi-Species Boltzmann Equation

报告时间：2022-03-30 10:00-11:00

报告人：王艳莉  北京计算科学研究中心

腾讯会议ID：277-238-361

报告入口：https://meeting.tencent.com/dm/o2Jq5IKkZ5tb

Abstract：We introduce a numerical scheme for the full multi-species Boltzmann equation based on Hermite spectral method. With the proper choice of expansion centers for different species, a practical algorithm is derived to evaluate the complicated multi-species binary collision operator. New collision models are built by combining the quadratic collision model and the simple BGK collision model under the framework of the Hermite spectral method, which enables us to balance the computational cost and accuracy. Several numerical experiments are implemented to validate the dramatic efficiency of this new Hermite spectral method. Moreover, we can handle the problems with as many as 100 species, which is far beyond the capability of the state-of-art algorithm.