摘要
基于微尺度流动的滑移模型,建立了二维微槽道内气体流动的计算方法,并开发了计算程序.对相关文献中微槽道内的气体流动进行了计算,得到了压力降和速度分布剖面图,计算结果与试验结果吻合较好.在此基础上,进一步研究了克努森数Kn、切向动量调节系数σv及雷诺数Re对速度分布的影响.当Kn>0.001时,边界滑移速度随着Kn的增大而增大;σv的变化对滑移速度的影响十分显著,σv减小时,边界滑移速度增大;在滑流区范围内与低Re时,Re的变化对边界滑移速度的影响很小.
The algorithm of gaseous flow in two-dimensional micro-channels was set up and the corresponding program based on micro-flow theory was developed. The gaseous flow in micro-channels was numerically analyzed and the pressure drop as well as velocity profile of the micro-channels was obtained. The numerical results agree well with the experimental results. Moreover, the effects of Kn, σv and Re on the velocity profiles were analyzed. When Kn>0.001, with the increasing of Kn number, the slip velocity on wall boundary increases; The tangential momentum coefficient σv affects greatly on the slip velocity, with the decreasing of σv, the slip velocity increases; And Re number makes little effect on the slip velocity under the condition of low Re number and slip flow regime.
出处
《上海交通大学学报》
EI
CAS
CSCD
北大核心
2004年第10期1695-1698,共4页
Journal of Shanghai Jiaotong University
基金
国家自然科学基金资助项目(50276034)
关键词
微槽道
气体流动
数值模拟
克努森数
滑移
Computer simulation
Gas dynamics
Navier Stokes equations
Pressure drop
Slip forming
Two dimensional
