Morphological classification and dynamics of a two-dimensional drop sliding on a vertical plate
Morphological classification and dynamics of a two-dimensional drop sliding on a vertical plate
复制标题
二维液滴在垂直板上滑动的形态分类和动力学
DOI：
10.1140/epje/i2018-11707-7
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发表时间：
2018-08
期刊：
影响因子：
--
通讯作者：
Xiao Peng Chen
中科院分区：
文献类型：
--
作者：
Ming;Xiao Peng Chen
本文对二维液滴在重力作用下沿平板的滑动进行了数值研究。采用格子Boltzmann方法与相场方法相结合，可以很好地捕捉三相接触线的运动。在此过程中，考虑了液滴的形态和相应的力平衡。结果表明，在不同的重力和粘性作用下，液滴存在两种基本的滑动模式。粘性剪切应力（来自壁面）作用在液滴底部，并分为两部分。一个在接触线区域，另一个在固液界面的其余部分（接触区域）。前者表现为峰，其纯粹由固有接触角（和滑动速度）决定。他们是非常当地的。当重力较小时，水滴下滑得很慢，这样的剪切力可以平衡重力。同时，液滴的形状可以有趣地表征为“悬垂液滴”。当重力增加时，主要由于液滴后部出现踪迹而产生额外的剪切力。脱湿破坏条件使滑动速度几乎恒定在这个政权。本研究对理解三维液滴滑动的物理过程也有价值。图形摘要
AbstractA two-dimensional drop sliding down a plate under the action of gravity is numerically studied. A lattice Boltzmann method coupled with the phase field method is utilized, which can well capture the motion of the three-phase contact line. The morphologies of the sliding drop and corresponding force balance during the process are considered. It is found that there are two basic sliding modes of the drop with various gravitational and viscous effects. The viscous shear stress (from the wall acts on the bottom of the drop, and it is divided in two parts. One is in the contact line region, and the other on the rest part of the solid-liquid interface (contacting area). The former one appears as-peaks, which are purely determined by the intrinsic contact angle (and sliding speed. They are very local. When the gravity is small, the drop slides down very slowly, and such shear force can balance the gravity. Meanwhile, the shape of the droplet can be interestingly characterized as a “pendant drop”. When the gravity increases, an additional shear force is generated mainly due to the appearing of a trail at the rear part of the drop. The de-wetting failure condition makes the sliding velocity almost constant in this regime. The present study is also valuable to understand the physics of three-dimensional drop sliding.Graphical abstract
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DOI：
10.1016/j.jcp.2010.07.007
发表时间：
2010-10
期刊：
J. Comput. Phys.
影响因子：
--
作者：
Taehun Lee;Lin Liu
通讯作者：
Taehun Lee;Lin Liu
DOI：
10.1103/physreve.78.066307
发表时间：
2008-12
期刊：
Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子：
--
作者：
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通讯作者：
R. Borcia;I. Borcia;M. Bestehorn
影响因子：
8.6
作者：
Podgorski, T;Flesselles, JM;Limat, L
通讯作者：
Limat, L
影响因子：
2.4
作者：
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通讯作者：
Doolen, GD
影响因子：
3.7
作者：
N. Savva;S. Kalliadasis
通讯作者：
N. Savva;S. Kalliadasis