TY - JOUR
T1 - Rotating Surfaces Promote the Shedding of Droplets
AU - Tao, Ran
AU - Fang, Wei
AU - Wu, Jun
AU - Dou, Binhong
AU - Xu, Wanghuai
AU - Zheng, Zhanying
AU - Li, Bing
AU - Wang, Zuankai
AU - Feng, Xiqiao
AU - Hao, Chonglei
N1 - Funding Information:
Funding: This work was supported by the National Natural Science Foundation of China (nos. 52005128 and 11921002), China Postdoctoral Science Foundation (nos. 2021 M690833 and 2021 M701905), and Shenzhen Science and Technology Program (nos. KQTD20210811090146075 and JCYJ20210324132810026). Author contributions: C.H. conceived the project. B.L., Z.W., X.F., and C.H. supervised the research. R.T., J.W., and B.D. carried out the experiments. W.F., Z.Z., and X.F. performed the simulation. R.T., W.F., J.W., W.X., and C.H. analyzed the data. R.T., W.F., Z.W., X.F., and C.H. wrote the manuscript. All authors have given approval to the final version of the manuscript. R.T. and W.F. contributed equally to this work. Competing interests: The authors declare that they have no competing interest.
Publisher Copyright:
© 2023 Ran Tao et al.
PY - 2023/1
Y1 - 2023/1
N2 - 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 inertialcapillary 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.
AB - 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 inertialcapillary 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.
UR - https://www.scopus.com/pages/publications/85153679402
U2 - 10.34133/research.0023
DO - 10.34133/research.0023
M3 - Journal article
AN - SCOPUS:85153679402
SN - 2096-5168
VL - 6
JO - Research
JF - Research
M1 - 0023
ER -