东南大学学报（英文版）2019，Vol.35Issue(1)：30-35,6.DOI:10.3969/j.issn.1003-7985.2019.01.005
微尺度剪切驱动流滑移膜阻尼的有效多松弛时间格子Boltzmann模拟
Multi-relaxation-time lattice Boltzmann simulation of slide damping in micro-scale shear-driven rarefied gas flow
摘要
Abstract
To investigate the slide film damping in the micro-scale shear-driven rarefied gas flows, an effective multi-relaxation-time lattice Boltzmann method (MRT-LBM) is proposed. Through the Knudsen boundary layer model, the effects of wall and rarefaction are considered in the correction of relaxation time. The results of gas velocity distributions are compared among the MRT, Monte Carlo model (DSMC) and high-order LBM, and the effects of the tangential momentum accommodation coefficient on the gas velocity distributions are also compared between the MRT and the high-order LBM. It is indicated that the amendatory MRT-LBM can unlock the dilemma of simulation of micro-scale non-equilibrium. Finally, the effects of the Knudsen number, the Stokes number, and the gap between the plates on the damping are researched. The results show that by decreasing the Knudsen number or increasing the Stokes number, the slide film damping increases in the transition regime; however, as the size of the gap increases, the slide film damping decreases substantially.关键词
格子Boltzmann模型(LBM)/多松弛时间/滑移膜阻尼/剪切驱动振荡流Key words
lattice Boltzmann method/multi-relaxation-time/slide film damping/shear-driven oscillating flow分类
数理科学引用本文复制引用
宋绪成,李普,朱睿..微尺度剪切驱动流滑移膜阻尼的有效多松弛时间格子Boltzmann模拟[J].东南大学学报（英文版）,2019,35(1):30-35,6.基金项目
The National Natural Science Foundation of China (No.51375091) （No.51375091）
