结构高度对纳米液滴碰撞壁面过程的影响

Effect of Structure Height on Process of a Nano-droplet Colliding With a Wall

液滴与壁面的碰撞过程广泛存在于自然界以及各类生产生活中,探究其传热传质作用机理以及形态演变对发展表面自清洁、喷墨打印、强化滴状冷凝、抗结冰结霜等技术都具有重要意义。为了探究结构高度在碰撞过程中的作用,本文通过分子动力学模拟对纳米液滴与壁面的碰撞过程进行了研究。构建了具有方柱状结构的粗糙表面模型,研究了壁面上纳米柱状结构的高度对碰撞过程的影响,记录了液滴的变形过程,并对相关的动力学特征以及能量变化进行了分析。

The collision process between droplet and wall widely exists in nature and all kinds of production and life.It is of great significance to explore the mechanism of heat and mass transfer and morphological evolution for the development of surface self-cleaning,ink-jet printing,enhanced droplet condensation,anti icing and frosting technologies.In order to explore the effect of structure height,the collision process between the nano-droplet and the wall was studied by molecular dynamics simulation.A rough surface model with square columnar structure was constructed,and the effect of the height of the nano columnar structure on the collision process was studied.The deformation process of the droplet was recorded,and the relevant dynamic characteristics and energy changes were analyzed.