纳米通道滑移流动的分子动力学模拟研究  

MOLECULAR DYNAMICS STUDIES OF VELOCITY SLIP PHENOMENA IN A NANOCHANNEL

作　　者：徐超[1] 何雅玲[1] 王勇[1] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049

出　　处：《工程热物理学报》2005年第6期912-914,共3页Journal of Engineering Thermophysics

基　　金：国家杰出青年科学基金资助项目(No.50425620)全国博士学位论文作者专项资金资助项目(No.200436)

摘　　要：本文采用非平衡分子动力学方法对平板纳米通道滑移流动进行了非平衡分子动力学模拟,获得了不同壁面势能和不同温度时流体的速度分布及密度分布。研究结果表明滑移速度在很大程度上决定于流体温度和壁面吸引力作用强度的大小。由于不同壁面吸引力时流体的密度分布受温度的影响规律不同,使得不同壁面吸引力时流体的滑移速度受温度影响规律也不一致。而且,流体结构受壁面流速的影响要受到壁面势能的制约。Non-equilibrium MD simulations were employed to Xi＇an Jiao Tong University to investigate the velocity slip phenomena in Couette flow confined in a nanochannel. Velocity distributions and density profiles of confined fluid with different fluid-wall interactions and different temperatures are determined. The results show that slip behaviors are dependent on the fluid temperature and the attractive force strengths of fluid-wall interaction. For different attractive force strengths of fluid-wall interaction, the different influences of fluid temperature on the density profiles result in the different influences of fluid temperature on the velocity slip. Furthermore, the effect of wall velocity on the structure of confined fluid is related to the fluid-wall interaction.

关 键 词：分子动力学 纳米通道 速度滑移 

分 类 号：TK124[动力工程及工程热物理—工程热物理]