表面润湿性及温度梯度对液滴蠕爬的影响  

Effect of Surface Wettability and Temperature Gradient on Migration of Droplet

作　　者：唐秀涛 戴庆文[1] 王静秋[1] 黄巍[1] 王晓雷[1] TANG Xiutao;DAI Qingwen;WANG Jingqiu;HUANG Wei;WANG Xiaolei(College of Mechatronical Engineering,Nanjing University of Aeronautics And Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《机械制造与自动化》2021年第2期55-57,共3页Machine Building & Automation

摘　　要：采用分子动力学模拟的方法,探究温度梯度驱动下水滴在不同润湿性表面的蠕爬运动特性。研究表明:水滴在不同温度梯度驱动下,均从高温区域向低温区域运动,且水滴的蠕爬速度随温度梯度的增大而增大;水滴在固体表面运动时,底部会形成一层密度比较大的吸附层,并且润湿性较大的表面上水滴的吸附层密度较大。在润湿性较大且温度梯度较高的表面上,水滴具有较高的初始蠕爬速度,同时受到较大的摩擦力。By molecular dynamics simulation method,the migration characteristics of water droplets on different wettability surfaces driven by temperature gradient were studied.The results show that the water droplets move from high temperature region to low temperature one driven by different temperature gradients,and the migration velocity of water droplets increases with the increase of temperature gradients.When the water droplets move on the solid surface,a layer with high density forms at the bottom,and the adsorption layer with high wettability on the surface has high density.On the surface with larger wettability and higher temperature gradient,the water droplet has a high initial migration velocity and is subjected to a high friction force.

关 键 词：蠕爬 润湿性 温度梯度 分子动力学 

分 类 号：O357.2[理学—流体力学]