固体表面
机械
旋转(数学)
运动学
毛细管作用
惯性参考系
缩放比例
动力学(音乐)
接触角
曲面(拓扑)
联轴节(管道)
物理
材料科学
纳米技术
经典力学
化学物理
几何学
声学
热力学
数学
冶金
作者
Ran Tao,Wei Fang,Jun Wu,Binhong Dou,Wanghuai Xu,Zhanying Zheng,Bing Li,Zuankai Wang,Xi‐Qiao Feng,Chonglei Hao
出处
期刊:Research
[AAAS00]
日期:2023-01-01
卷期号:6
被引量:7
标识
DOI:10.34133/research.0023
摘要
Achieving rapid shedding of droplets from solid surfaces has received substantial attention because of its diverse applications. Previous studies have focused on minimizing contact times of liquid droplets interacting with stationary surfaces, yet little consideration has been given to that of moving surfaces. Here, we report a different scenario: A water droplet rapidly detaches from micro/nanotextured rotating surfaces in an intriguing doughnut shape, contributing to about 40% contact time reduction compared with that on stationary surfaces. The doughnut-shaped bouncing droplet fragments into satellites and spontaneously scatters, thus avoiding further collision with the substrate. In particular, the contact time is highly dependent on impact velocities of droplets, beyond previous descriptions of classical inertial-capillary scaling law. Our results not only deepen the fundamental understanding of droplet dynamics on moving surfaces but also suggest a synergistic mechanism to actively regulate the contact time by coupling the kinematics of droplet impingement and surface rotation.
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