Surface tension and wetting effects with smoothed particle hydrodynamics
Surface tension and wetting effects with smoothed particle hydrodynamics
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DOI：
10.1016/j.jcp.2013.02.038
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发表时间：
2013-06-15
影响因子：
4.1
通讯作者：
Kraft, Torsten
中科院分区：
文献类型：
--
作者：
Breinlinger, Thomas;Polfer, Pit;Kraft, Torsten
对于微米和纳米尺度的流动，表面体积分数增加，因此与固体结构接触的流体的行为主要由表面张力效应主导。使用光滑粒子流体动力学在纳米和微米尺度上模拟表面张力效应不仅需要有效描述液体和气体之间的界面，而且还需要描述由固体、液体和气体之间的三相接触所定义的三线。在这项研究中，我们提出了一个有效的和可靠的实现，它采取的液体-气体的表面张力和平衡接触角作为输入参数，并规定了在三线的液体-气体界面的法线方向的基础上所需的平衡接触角。这导致在一个强大的算法能够捕获的物理平衡润湿和治疗各种各样的情况下，包括不同的润湿角，钉扎效应和润湿的结构化表面。(C)2013 Elsevier Inc. All rights reserved.
For flows at the micro and nano scales the surface to volume fraction is increased and therefore the behavior of fluids in contact with solid structures is primarily dominated by surface tension effects. Modeling of surface tension effects at nano and micro scales using smoothed particle hydrodynamics requires an efficient description not only of the interface between liquid and gas, but also of the triple line defined by the three phase contact between the solid, liquid and gas. In this study, we propose an efficient and reliable implementation, which takes the liquid-gas surface tension and the equilibrium contact angle as input parameters and prescribes the normal direction of the liquid-gas interface at the triple line based on the desired equilibrium contact angle. This results in a robust algorithm capable of capturing the physics of equilibrium wetting and treating a large variety of cases including different wetting angles, pinning effects and wetting of structured surfaces. (C) 2013 Elsevier Inc. All rights reserved.