Pseudo-particle modeling for gas flow in microchannels

作     者：WANG LiMin GE Wei CHEN FeiGuo 

作者机构：State Key Laboratory of Multi-phase Complex System Institute of Process Engineering Chinese Academy of Sciences Beijing 100080 China Graduate University Chinese Academy of Sciences Beijing 100049 China 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2007年第52卷第4期

页      面：450-455页

核心收录：

学科分类：080704[工学-流体机械及工程] 080103[工学-流体力学] 08[工学] 0807[工学-动力工程及工程热物理] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 20336040, 20490201 and 20221603) the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No. KJCX-SW-L08) 

主　　题：微通道 气体流动 伪粒子模型 努森数 马赫数 

摘      要：The velocity profiles and temperature distributions of gas flow in microchannels, for Knudsen numbers ranging from 0.01 to 0.20, are investigated with pseudo-particle modeling (PPM). It has been found that the velocity profiles are mainly affected by Knudsen number and the external force fields applied. When Knudsen number was increased, the slip velocities on the walls increased at the beginning, and then decreased. The temperature distributions were also significantly affected by the external force. The Darcy friction factor increased with increasing Knudsen number, and its variation with Mach number under increased Knudsen number was similar to the so-called premature laminar-turbulent transition observed in experiments.