DataVXAdvanced SciencePaper
journal article·2019-11Open access

Ricocheting Droplets Moving on Super‐Repellent Surfaces

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

Advanced Science· Volume 6· Issue 21
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Source abstract

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.
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Research context

OpenAlex topics: Fluid Dynamics and Heat Transfer · Surface Modification and Superhydrophobicity · Adhesion, Friction, and Surface Interactions

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China

ARC Centre of Excellence in Convergent Bio‐Nano Science and Technology, and the Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia

Department of Chemical Engineering and the Particulate Fluids Processing Centre The University of Melbourne Parkville Victoria 3010 Australia

Department of Materials Department of Bioengineering, and the Institute of Biomedical Engineering Imperial College London London SW7 2AZ UK

Zachry Department of Civil Engineering Texas A&M University 3136 TAMU College Station TX 77843‐3136 USA

Department of Water Science and Engineering College of Civil Engineering Hunan University Changsha 410082 China

CAS Key Laboratory of Bio‐inspired Materials and Interfacial Sciences Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China

Funding

National Natural Science Foundation of China · China Scholarship Council · Natural Science Foundation of Hunan Province · Australian Research Council · National Health and Medical Research Council

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