接触角
格子Boltzmann方法
材料科学
外推法
润湿
多相流
相位角(天文学)
润湿转变
磁滞
机械
光学
复合材料
凝聚态物理
物理
数学分析
数学
作者
Xingguo Zhong,Yangsha Liu,Yichen Yao,Bing He,Bing-Hai Wen
出处
期刊:Chinese Physics B
[IOP Publishing]
日期:2023-05-01
卷期号:32 (5): 054701-054701
被引量:2
标识
DOI:10.1088/1674-1056/ac9cbd
摘要
Contact angle is an essential parameter to characterize substrate wettability. The measurement of contact angle in experiment and simulation is a complex and time-consuming task. In this paper, an improved method of measuring contact angle in multiphase lattice Boltzmann simulations is proposed, which can accurately obtain the real-time contact angle at a low temperature and larger density ratio. The three-phase contact point is determined by an extrapolation, and its position is not affected by the local deformation of flow field in the three-phase contact region. A series of simulations confirms that the present method has high accuracy and gird-independence. The contact angle keeps an excellent linear relationship with the chemical potential of the surface, so that it is very convenient to specify the wettability of a surface. The real-time contact angle measurement enables us to obtain the dynamic contact angle hysteresis on chemically heterogeneous surface, while the mechanical analyses can be effectively implemented at the moving contact line.
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