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arXiv 1502.04884physics.flu-dyn
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碰撞液滴计算中的Navier滑移边界条件

On the Navier-slip boundary condition for computations of impinging droplets

Jagannath Venkatesan, Sashikumaar Ganesan

摘要:

本文提出了一种适用于锐界面法计算液滴碰撞问题的摩擦边界条件下的滑移数与网格有关的关系。得到的关系作为雷诺数,韦伯数和网格尺寸的函数。所提出的关系验证了几个测试用例通过比较数值计算得到的润湿直径与实验结果。此外,计算得到的最大润湿直径使用建议的滑移关系与理论预测进行了验证。计算得到的最大润湿直径与理论预测值之间的相对误差小于10%的亲水性表面上的液滴,和疏水性表面的情况下的误差增加。

英文摘要:

A mesh-dependent relation for the slip number in the Navier-slip with friction boundary condition for computations of impinging droplets with sharp interface methods is proposed. The relation is obtained as a function of Reynolds number, Weber number and the mesh size. The proposed relation is validated for several test cases by comparing the numerically obtained wetting diameter with the experimental results. Further, the computationally obtained maximum wetting diameter using the proposed slip relation is verified with the theoretical predictions. The relative error between the computationally obtained maximum wetting diameter and the theoretical predictions is less than 10 % for impinging droplet on a hydrophilic surface, and the error increases in the case of hydrophobic surface.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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