Research on the dynamic characteristics of droplet impact on the boundary of hydrophilic and hydrophobic mixed surfaces
ZHOU Shihe
LI Min
FENG Yin
Abstract：To explore the dynamic characteristics of droplets hitting the boundary line of a hydrophilic and hydrophobic mixed wall,based on the fluid volume method(VOF),the movement process of droplets after hitting the wall under different combinations of impact speeds and hydrophilic and hydrophobic contact angles is simulated,and the movement characteristics of droplets in the hydrophilic and hydrophobic regions are analyzed.The results show that with the increase of impact speed,the retraction process of the droplet on the hydrophobic side is more likely to form a cavity,the possibility of droplet connection fracture on both sides increases,and the droplet on the hydrophobic side tends to perform a rotational motion of the moving shaft to separate from the hydrophobic surface.When the contact angles on both sides are relatively low,the droplets tend to migrate by adhering to the hydrophobic surface.As the contact angles on both sides increase,the droplets tend to rotate and detse from the hydrophobic surface.The research results can provide references for energy-saving technologies such as the design of high-efficiency heat exchange surfaces for spray cooling,self-cleaning and anti-icing surfaces.
Keywords：droplet impacthydrophilic and hydrophobic mixed surfacedynamic characteristicsVOF method
Publication Date：2025-08-30
Online Publishing Date：2025-10-22(First online date of this platform, not the publication date of the document)
Pages：4( 63-66 )