Rotating Surfaces Promote the Shedding of Droplets
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 movin...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Association for the Advancement of Science (AAAS)
2023-01-01
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| Series: | Research |
| Online Access: | https://spj.science.org/doi/10.34133/research.0023 |
| _version_ | 1797227490298560512 |
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| author | Ran Tao Wei Fang Jun Wu Binhong Dou Wanghuai Xu Zhanying Zheng Bing Li Zuankai Wang Xiqiao Feng Chonglei Hao |
| author_facet | Ran Tao Wei Fang Jun Wu Binhong Dou Wanghuai Xu Zhanying Zheng Bing Li Zuankai Wang Xiqiao Feng Chonglei Hao |
| author_sort | Ran Tao |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-13T07:12:54Z |
| format | Article |
| id | doaj.art-5fb2603885e045139df2635ba306059c |
| institution | Directory Open Access Journal |
| issn | 2639-5274 |
| language | English |
| last_indexed | 2024-04-24T14:41:38Z |
| publishDate | 2023-01-01 |
| publisher | American Association for the Advancement of Science (AAAS) |
| record_format | Article |
| series | Research |
| spelling | doaj.art-5fb2603885e045139df2635ba306059c2024-04-02T21:01:32ZengAmerican Association for the Advancement of Science (AAAS)Research2639-52742023-01-01610.34133/research.0023Rotating Surfaces Promote the Shedding of DropletsRan Tao0Wei Fang1Jun Wu2Binhong Dou3Wanghuai Xu4Zhanying Zheng5Bing Li6Zuankai Wang7Xiqiao Feng8Chonglei Hao9School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China.Institute of Biomechanics and Medical Engineering, Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China.School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China.School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China.Department of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, China.School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China.School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China.Department of Mechanical Engineering, City University of Hong Kong, Hong Kong 999077, China.Institute of Biomechanics and Medical Engineering, Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China.School of Mechanical Engineering and Automation, Harbin Institute of Technology, Shenzhen 518055, China.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.https://spj.science.org/doi/10.34133/research.0023 |
| spellingShingle | Ran Tao Wei Fang Jun Wu Binhong Dou Wanghuai Xu Zhanying Zheng Bing Li Zuankai Wang Xiqiao Feng Chonglei Hao Rotating Surfaces Promote the Shedding of Droplets Research |
| title | Rotating Surfaces Promote the Shedding of Droplets |
| title_full | Rotating Surfaces Promote the Shedding of Droplets |
| title_fullStr | Rotating Surfaces Promote the Shedding of Droplets |
| title_full_unstemmed | Rotating Surfaces Promote the Shedding of Droplets |
| title_short | Rotating Surfaces Promote the Shedding of Droplets |
| title_sort | rotating surfaces promote the shedding of droplets |
| url | https://spj.science.org/doi/10.34133/research.0023 |
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