Xu Jie

Gu Chuangang

Wang Tong

Key Laboratory for Power Machinery and Engineering of Ministry of Education,

Shanghai Jiaotong University,

Shanghai 200030, China

Abstract: The algorithm of gaseous flow in bi-dimensional micro-channels is set up and the corresponding program based on micro-flow theory is presented. Gaseous flow in micro-channels is numerically analyzed and the pressure drop along the duct as well as the velocity profile in the micro-channels is obtained. The numerical results agreed well with the experimental results in the references. Moreover, the effects of Kn,sv and Re on the velocity profiles are analyzed. It is found that for Kn>0.001, with increasing Kn number, the slip velocity on the wall boundary increases; the tangential momentum coefficient sv affects the slip velocity greatly. The slip velocity increases with decreasingsv In the slip flow regime and for low Re numbers, the slip velocity is little influenced by the Re number.