Universal scaling of droplet retraction dynamics on vibrating surfaces

被引:4
|
作者
Song, Mingkai [1 ]
Liu, Xiaonan [2 ]
Wang, Ting [2 ]
Xu, Wanghuai [3 ]
Zhao, Shengteng [1 ]
Wang, Shunbo [1 ]
Wang, Zuankai [3 ]
Zhao, Hongwei [1 ,4 ]
机构
[1] Jilin Univ, Sch Mech & Aerosp Engn, Changchun 130025, Peoples R China
[2] City Univ Hong Kong, Dept Mech Engn, Hong Kong 999077, Peoples R China
[3] Hong Kong Polytech Univ, Dept Mech Engn, Hong Kong 999077, Peoples R China
[4] Minist Educ, Key Lab CNC Equipment Reliabil, Changchun 130025, Peoples R China
基金
中国国家自然科学基金;
关键词
IMPACT;
D O I
10.1063/5.0152599
中图分类号
O59 [应用物理学];
学科分类号
摘要
Over the past decade, extensive efforts have been made in the study of droplet impact, especially on stationary surfaces, owing to its direct applications in thermal cooling, self-cleaning, and power generation. However, many practical applications, such as ultrasonic cleaning, aerosolized drug delivery, and vibration-assisted welding, involve the direct interaction of droplets with vibrating surfaces, on which droplets undergo spreading and retraction. Distinct from stationary surfaces where the retraction behaviors, such as the retraction velocity and rate, are mainly governed by the surface wettability and droplet inertia, the retraction behaviors on vibrating surfaces become complicated due to the vibration velocity, which dictates the outcomes of droplet impact, such as the pinning, bouncing, gyrating, and jetting. Here, we revealed the synergistic effect of droplet inertia and vibration velocity on droplet retraction. We found that the droplet retraction behaviors on both stationary and vibrating surfaces could be characterized by a universal scaling law, allowing us to analyze and predict the maximum droplet retraction velocities. Moreover, we found that the maximum retraction rate increased with the maximum spreading radius at low Weber numbers. We demonstrated that the droplet retraction dynamics at both low Weber numbers and high Weber numbers could be unified into one integrated model, which indicates the decisive role of the maximum droplet spreading in droplet retraction dynamics.
引用
收藏
页数:6
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