所属单位：能源与动力学院
发表刊物：COMPUTATIONAL MATERIALS SCIENCE
关键字：Boltzmann transport equation FVM Thermal conductivity Discrete number of velocity directions Superlattices
摘要：In this paper, we analyze the effect of the discrete number of velocity directions of the phonon on thermal conductivity prediction in the cross-plane direction of superlattices based on solving the phonon Boltzmann transport equation (BTE) numerically. The simulation shows that the accuracy of the calculation is mainly affected by discretization number of polar angle (N-theta). To improve the efficiency in the two-dimensional situation, choosing a proper discrete number of velocity directions of the phonon can be used. Besides, the relationship between the control angle (M) and Knudsen (Kn) number is concluded when the relative error is less than 5%.
ISSN号：0927-0256
是否译文：否
发表时间：2018-07-01
合写作者：Li, Mingqiang,Zhu, Qibin
通讯作者：史波
发表时间：2018-07-01