Rotating Surfaces Promote the Shedding of Droplets.
Rotating Surfaces Promote the Shedding of Droplets.
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DOI：
10.34133/research.0023
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Hao C
中科院分区：
文献类型：
--
作者：
Tao R;Fang W;Wu J;Dou B;Xu W;Zheng Z;Li B;Wang Z;Feng X;Hao C
实现液滴从固体表面的快速脱落已经收到了大量的关注，因为它的各种应用。以往的研究主要集中在最小化液滴与静止表面相互作用的接触时间，而很少考虑运动表面的接触时间。在这里，我们报告了一个不同的场景：一个水滴以一个有趣的甜甜圈形状从微/纳米纹理的旋转表面快速分离，与静止表面相比，减少了大约40%的接触时间。甜甜圈形状的弹跳液滴碎片进入卫星并自发散射，从而避免了与基片的进一步碰撞。特别是，接触时间高度依赖于液滴的冲击速度，超出了以往经典惯性-毛细结垢定律的描述。我们的研究结果不仅加深了对运动表面上液滴动力学的基本理解，而且还提出了一种通过液滴撞击和表面旋转运动学耦合来主动调节接触时间的协同机制。
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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影响因子：
16.6
作者：
Gauthier A;Symon S;Clanet C;Quéré D
通讯作者：
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影响因子：
3.3
作者：
Bird, James C.;Tsai, Scott S. H.;Stone, Howard A.
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影响因子：
4.6
作者：
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通讯作者：
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DOI：
10.1073/pnas.2002924117
发表时间：
2020-06-23
影响因子：
11.1
作者：
Kim, Seungho;Wu, Zixuan;Jung, Sunghwan
通讯作者：
Jung, Sunghwan
影响因子：
8.6
作者：
Choi, CH;Kim, CJ
通讯作者：
Kim, CJ