中文摘要：

近年来，有很多关于液滴在不同结构表面上的润湿过程的微观尺度研究，但是住结构表面上的凝结过程研究却很少。本文使用分子动力学模拟了水滴的动态润湿过程和水蒸气在具有不同结构参数的硅表面上的凝结过程。结果表明，不论是光滑表面还是具有纳米结构的表面，液滴在表面上最终都会呈现出球缺形状态。除此之外，气态水分子在结构间隙小的表面上倾向于在结构顶部聚集，而在结构间隙大的表面上倾向于在结构底部聚集。

英文摘要：

In recent years, a lot of researches were carried out on the wetting process of d~＇oplet on various textured surfaces at the micro-scale level, there are very few reports on the simulation study of condensation process on patterned surfaces. This paper report numerical studies on water droplet＇s dynamic wetting behavior and the process of water molecules condensing on silicon surface, with different pillar structure parameters by molecular dynamic simulation. It is found that droplets exhibit a spherical shape whether on a smooth surface or on a rough surface with nanostructure,except that, gaseous water molecules tend to gather on the top of pillars to form clusters wtmn the structure gap is small and tend to gather at the bottom of pillars when the structure gap is large.