重庆大学学报2025，Vol.48Issue(12)：49-59,11.DOI:10.11835/j.issn.1000-582X.2024.281
超疏水表面上液滴碰撞的分融判据
Coalescence or bounce criterion for droplet collision on a superhydrophobic surface
摘要
Abstract
This study investigates the influence of droplet velocity on the collision behavior of equal-sized binary water droplets impacting head-on on a superhydrophobic surface.Using a high-speed camera,the dynamic process of droplet collision process was recorded,and a theoretical model was developed to describe the critical conditions governing post-collision coalescence or bouncing.The model accurately predicts the critical velocity that determines whether droplets coalesce or rebound after collision.Experimental results show that as droplet velocity increases,the probability of coalescence also increases,while larger droplet diameters correspond to lower critical velocities for the coalescence-bouncing transition.During the deformation stage of collision,internal pressure within the droplets may exceed the surface tension threshold,resulting in coalescence.The proposed theoretical model demonstrates strong agreement with experimental observations and can effectively predict droplet behavior at various velocities.This provides a theoretical basis for controlling droplet collision dynamics,with potential applications in droplet manipulation,sensing,and microreactor technologies.关键词
液滴碰撞/超疏水/临界条件Key words
droplet collision/superhydrophobic/critical condition分类
数理科学引用本文复制引用
LI Ke,WANG Jishuo,YUAN Weifeng..超疏水表面上液滴碰撞的分融判据[J].重庆大学学报,2025,48(12):49-59,11.基金项目
国家自然科学基金资助项目(12072300). Supported by National Natural Science Foundation of China(12072300). （12072300）
