Controllable self-transport of bouncing droplets on ultraslippery surfaces with wedge-shaped grooves  

作　　者：Chuchen Yue Qingwen Dai Xiaolong Yang Carsten Gachot Wei Huang Xiaolei Wang 

机构地区：[1]College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics&Astronautics,Nanjing,China [2]Institute of Engineering Design and Product Development,Tribology Research Group,TU Wien,Vienna,Austria

出　　处：《Droplet》2024年第2期138-145,共8页液滴（英文）

基　　金：the support from the National Natural Science Foundation of China(No.51805252);Qingwen Dai acknowledges the support from the Alexander von Humboldt Foundation.Especially,Chuchen Yue thanks Kai Zhuang for critical discussions.

摘　　要：Preventing the accretion of droplets on surfaces is vital and slippery liquid-infused porous surfaces(SLIPS)have promising application prospects,such as surface self-cleaning and droplet transportation.In this work,controllable self-transport of bouncing droplets on ultraslippery surfaces with wedge-shaped grooves is reported.The impact behaviors of droplets on SLIPS under various impact velocities and diameters are explored,which can be classified as hover,total bounce,partial bounce,Worthington jet,and crush.SLIPS with wedge-shaped grooves were designed to transport accreted droplets.An energy and transport model is established to explain the impact and self-transport mechanism,where the Laplace pressure and moving resistance between droplets play a key role.Finally,SLIPS with branched wedge-shaped grooves were designed for droplet self-transport and demonstrated advantages.This work provides a general reference for spontaneous motion control of sessile droplets,droplets with initial impacting velocity,or even liquid films.

关 键 词：WEDGE SHAPED droplets 

分 类 号：O35[理学—流体力学]