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Ricocheting Droplets Moving on Super‐Repellent Surfaces

Authors :
Shuaijun Pan
Rui Guo
Joseph J. Richardson
Joseph D. Berry
Quinn A. Besford
Mattias Björnmalm
Gyeongwon Yun
Ruoxi Wu
Zhixing Lin
Qi‐Zhi Zhong
Jiajing Zhou
Qiang Sun
Jianhua Li
Yanbing Lu
Zhichao Dong
Margaret Katherine Banks
Weijian Xu
Jianhui Jiang
Lei Jiang
Frank Caruso
Source :
Advanced Science, Vol 6, Iss 21, Pp n/a-n/a (2019)
Publication Year :
2019
Publisher :
Wiley, 2019.

Abstract

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.

Details

Language :
English
ISSN :
21983844
Volume :
6
Issue :
21
Database :
Directory of Open Access Journals
Journal :
Advanced Science
Publication Type :
Academic Journal
Accession number :
edsdoj.b5ae97d796334306aa82bc7dc1b06210
Document Type :
article
Full Text :
https://doi.org/10.1002/advs.201901846