微通道中压力驱动Poiseuille流数值分析  

Numerical Analysis of Pressure-Driven Poiseuille Flow Through Micro-Channel

作　　者：唐桂华[1] 翟广新[1] 盛强[1] 顾晓军 

机构地区：[1]西安交通大学,热流科学与工程教育部重点实验室,能源与动力工程学院,陕西西安710049 [2]CSED,STFC Daresbury Laboratory,Warrington WA4 4AD,UK

出　　处：《工程热物理学报》2012年第12期2167-2170,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51076125)

摘　　要：采用26阶矩方程方法对稀薄气体在平板微通道与微圆通道中压力驱动的Poiseuille流动进行数值分析,获得稀薄气体在微通道内的速度分布、压力分布规律。数值分析结果表明:气体压力在微通道中沿主流方向呈非线性分布,且非线性程度随Kn数的增大而减小,分布趋势随Kn数的改变产生微小的变化;随Kn数的增大,微圆通道中气体沿径向速度分布出现双峰现象。研究结果与DSMC方法及格子-Boltzmann方法对比符合较好。The pressure-driven Poiseuille flow of a rarefied gas in micro-channel and micro-tube is analyzed by the 26 moments method, and the profiles of velocity and pressure are obtained. Numerical analysis shows the deviation of the pressure distribution from a linear pressure. The larger the Kn number, the smaller deviation of the pressure. For the micro-tube, when the Kn number increases, there appears two peaks in the distribution of the streamwise velocity. The numerical results are in good agreement with available DSMC and LBM data.

关 键 词：矩方程方法 微尺度 稀薄气体 Poiseuille流动 

分 类 号：O356[理学—流体力学]