Long-time evolution of interfacial structure of partial wetting
Long-time evolution of interfacial structure of partial wetting
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DOI：
10.1103/physrevfluids.5.114001
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发表时间：
2020-06
影响因子：
2.7
通讯作者：
M. He
中科院分区：
文献类型：
--
作者：
M. He
当固体板从部分润湿的液体中取出时，液体层使移动的基底去湿。高速成像揭示了在稳态下在横向方向上的夹带层中交替的薄区域和厚区域。本文系统地比较了这种情况下的反向过程，强制润湿，其中固体夹带空气层沿着其表面，因为它被推入液体。为了精确地量化这些稳态结构的绝对厚度，我开发了一种光学技术，利用干涉的角度依赖性，结合基于最大似然估计的方法。数据显示，膜的两个区域的厚度与毛细管数Ca成比例。此外，在发病期间观察到一个新的区域，该区域不同于先前模型预测的行为。
When a solid plate is withdrawn from a partially wetting liquid, a liquid layer dewets the moving substrate. High-speed imaging reveals alternating thin and thick regions in the entrained layer in the transverse direction at steady state. This paper systematically compares this situation to the reversed process, forced wetting, where a solid entrains an air layer along its surface as it is pushed into a liquid. To quantify the absolute thickness of these steady-state structures precisely, I have developed an optical technique, taking advantage of the angle dependence of interference, combined with a method based on a maximum likelihood estimation. The data show that the thicknesses of both regions of the film scale with the capillary number, Ca. In addition, a new region is observed during onset which differs from the behavior predicted by previous models.