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力学学报  2015 

重力和接触角对表面张力贮箱内液体流动的影响

DOI: 10.6052/0459-1879-14-255, PP. 430-440

Keywords: 表面张力贮箱,重力,接触角,液体流动,数值模拟

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Abstract:

采用流体体积函数方法数值模拟板式表面张力贮箱内液体的流动过程.主要考虑了不同重力加速度和接触角等因素的影响.发现在接触角等于10°的前提下,重力加速度小于10-2g0,液体沿着外侧导流叶片爬升至贮箱顶部;当重力加速度小于10-3g0时,重力加速度的减小对液体爬升速度的影响较小.在爬升过程中,导流叶片附近液体的速度呈逐渐减小的趋势,且重力加速度越小,初始速度越大.接触角对液体的爬升高度也会产生影响,接触角越小,液体爬升至顶部的时间越短;当接触角大于45°时,外侧导流叶片附近的液面不能爬升至顶端.另外,接触角越大,液面高度的斜率越小,导流叶片附近液体的初始速度也越小.

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