The contact angle for a droplet on homogeneous and spherical concave surfaces

被引：3
|
作者：
Hu, Ai-Jun [1 ]
Lv, Bao-Zhan [1 ]
Wang, Xiao-Song [1 ]
Zhou, Long [1 ]
机构：
[1] Henan Polytech Univ, Sch Mech & Power Engn, 2001 Century Ave, Jiaozuo 454003, Henan Province, Peoples R China
来源：
MODERN PHYSICS LETTERS B | 2016年 / 30卷 / 07期
关键词：
Thermodynamics; droplet; contact angle; surface tension; line tension; LINE TENSION;
D O I：
10.1142/S0217984916500780
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Wetting of droplets on homogeneous and spherical concave rough surfaces is investigated based on thermodynamics. In this study, neglecting the droplet gravity and the thickness of the precursor film of the liquid vapor interface, the three-phase system is divided into six parts using Gibbs concept of dividing surface. The system Helmholtz free energy is established based on thermodynamics. Supposing the temperature and chemical potential to be constant, a new generalized Young's equation of the equilibrium contact angle for a spherical droplet on a spherical concave rough surfaces is obtained including the line tension effects. Under certain conditions, this generalized Young's equation is the same as the Rusanov's equation.
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页数：9
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