Aerodynamic Super-Repellent Surfaces  

作　　者：Fanfei Yu Jinlong Yang Ran Tao Yao Tan Jinpei Wang Dehui Wang Longquan Chen Zuankai Wang Xu Deng 

机构地区：[1]Institute of Fundamental and Frontier Sciences,University of Electronic Science and Technology of China,Chengdu 610054,P.R.China [2]Department of Mechanical Engineering,City University of Hong Kong,Kowloon,Hong Kong Special Administrative Region 999077,P.R.China [3]School of Physics.University of Electronic Science and Technology of China,Chengdu 610054,P.R.China [4]Department of Mechanical Engineering,Hong Kong Polytechnic University,Kowloon,Hong Kong Special Administrative Region 999077,P.R.China [5]Shenzhen Institute for Advanced Study,University of Electronic Science and Technology of China,Shenzhen 518110,P.R.China

出　　处：《Research》2024年第2期115-122,共8页研究（英文）

基　　金：support by the National Natural Science Foundation of China(22202035,22072014,and 22102017);the Chengdu Science and Technology Bureau(2021-GH02-00105-HZ);the Shenzhen Science and Technology Program(JCYJ20210324142210027);the Central Government Funds of Guiding Local Scientific and Technological Development for Sichuan Province(2021ZYD0046);the Sichuan Outstanding Young Scholars Foundation(2021JDJQ0013);the Sichuan Science and Technology Program(2021JDRC0016).

摘　　要：Repelling liquid drops from engineering surfaces has attracted great attention in a variety of applications.To achieve efficient liquid shedding,delicate surface textures are often introduced to sustain air pockets at the liquid-solid interface.However,those surfaces are prone to suffer from mechanical failure,which may bring reliability issues and thus limits their applications.Here,inspired by the aerodynamic Leidenfrost effect,we present that impacting drops are directionally repelled from smooth surfaces supplied with an exogenous air layer.Our theoretical analysis reveals that the synchronized nonwetting and oblique bouncing behavior is attributed to the aerodynamic force arising from the air layer.The versatility and practicability of our approach allow for drop repellency without the aid of any surface wettability treatment and also avoid the consideration of mechanical stability issues,which thereby provides a promising candidate for the applications that necessitate liquid shedding,e.g.,resolve the problem of tiny raindrop adhesion on the automobile side window during driving.

关 键 词：thereby driving attributed 

分 类 号：O313[理学—一般力学与力学基础]