本文采用有限容积(FV)-分子动力学(MD)耦合算法对微通道内的液体流动进行了模拟研究.分析了通道宽度以及流固作用势强度对流体流动形式和壁面滑移速度的影响.结果显示:通道宽度减小与流固作用势的减弱都会使速度分布与宏观尺度下的分析解出现更大偏离,滑移速度与滑移长度明显增加.对于流体为液体氩,壁面为金属铂的工况条件,当通道宽度超过约0.6μm时,滑移速度不足最大流速的0.5%,滑移长度不足通道宽度的0.2%.
In this paper,the FV(finite volume)-MD(molecular dynamics)coupling algorithm was employed to study the liquid flow in microchannels.The effects of the channel width and the liquid-solid interaction were analyzed.The results show that the decreases in channel width and liquid-solid interaction cause the velocity profile deviates from the analytical solution and the emergence of velocity slip.In the case of Ar-Pt.the velocity slip is less than 0.5% of the max-imum velocity and the slip length is less than 0.2% of the channel width when the width is over 0.6 μm.
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