Ricocheting Droplets Moving on Super-Repellent Surfaces.

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ID: 65879
2019
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Ranked #24 of 57 articles by views in Advanced science (Weinheim, Baden-Wurttemberg, Germany)

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Abstract
Droplet bouncing on repellent solid surfaces (e.g., the lotus leaf effect) is a common phenomenon that has aroused interest in various fields. However, the scenario of a droplet bouncing off another droplet (either identical or distinct chemical composition) while moving on a solid material (i.e., ricocheting droplets, droplet billiards) is scarcely investigated, despite it having fundamental implications in applications including self-cleaning, fluid transport, and heat and mass transfer. Here, the dynamics of bouncing collisions between liquid droplets are investigated using a friction-free platform that ensures ultrahigh locomotion for a wide range of probing liquids. A general prediction on bouncing droplet-droplet contact time is elucidated and bouncing droplet-droplet collision is demonstrated to be an extreme case of droplet bouncing on surfaces. Moreover, the maximum deformation and contact time are highly dependent on the position where the collision occurs (i.e., head-on or off-center collisions), which can now be predicted using parameters (i.e., effective velocity, effective diameter) through the concept of an effective interaction region. The results have potential applications in fields ranging from microfluidics to repellent coatings.
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pan2019ricochetingadvanced Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Pan, Shuaijun;Guo, Rui;Richardson, Joseph J;Berry, Joseph D;Besford, Quinn A;Björnmalm, Mattias;Yun, Gyeongwon;Wu, Ruoxi;Lin, Zhixing;Zhong, Qi-Zhi;Zhou, Jiajing;Sun, Qiang;Li, Jianhua;Lu, Yanbing;Dong, Zhichao;Banks, Margaret Katherine;Xu, Weijian;Jiang, Jianhui;Jiang, Lei;Caruso, Frank;
Journal Advanced science (Weinheim, Baden-Wurttemberg, Germany)
Year 2019
DOI
10.1002/advs.201901846
URL
Keywords
contact time droplet bouncing interfacial phenomena repellent coatings surface science

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