Dynamic wetting angle of a spreading droplet
Dynamic wetting angle of a spreading droplet
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DOI：
10.1016/j.expthermflusci.2005.03.006
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发表时间：
2005-08
影响因子：
3.2
通讯作者：
Š. Šikalo;C. Tropea;E. Ganic
中科院分区：
文献类型：
--
作者：
Š. Šikalo;C. Tropea;E. Ganic
动态接触角是毛细管流体力学建模问题的边界条件，包括液滴碰撞问题的某些阶段。即使在低速下，动态接触角也明显不同于静态前进或后退值。本文介绍了铺展液滴在水平和倾斜表面上碰撞后的动态接触角的实验结果。85%（vol.）甘油/水溶液（D=2.45mm）和水（D=2.7mm）用于研究。使用两种表面，蜡（低粘度）和玻璃（高粘度），以研究表面润湿性（静态接触角）的影响。结果包括液滴的动态接触角连同接触线速度和作为时间的函数的无量纲扩展因子。
The dynamic contact angle is required as a boundary condition for modelling problems in capillary hydrodynamics, including certain stages of the droplet impact problem. The dynamic contact angle differs appreciably from the static advancing or receding values, even at low velocities. This paper presents experimental results of the dynamic contact angle of spreading droplets after impacting on horizontal and inclined surfaces. Droplets of an 85% (vol.) glycerin/water solution (D=2.45mm) and water (D=2.7mm) were used in the study. Two surfaces, wax (low wettable) and glass (high wettable) are used, to study the effect of surface wettability (static contact angle). The results include the dynamic contact angle of droplets together with the contact line velocity and the dimensionless spread factor as a function of time.