液滴撞击超疏水管状壁面的动态特性研究

Study of dynamic processes of droplet impact on super hydrophobic tubular surfaces

中文关键词: 液滴撞击  超疏水壁面  管状壁面  动态特性

英文关键词: droplet impact  superhydrophobic surface  tubular surface  dynamic characteristics

中文摘要:

      利用相界面追踪的CLSVOF(coupled level set and volume of fluid)方法,对液滴在不同速度下撞击超疏水管状壁面的演化过程展开研究。研究结果表明,不同初速度会对液滴在管壁上的动态特性产生较大影响。当撞击速度较小时,液膜会以整体的形态反弹；继续增大撞击速度后,由于受到外缘液膜的牵扯,液膜内部开始出现断裂,撞击速度足够大时,液膜发生解体破碎。同时给出了对于初速度在2.00m/s以内、直径为2.58mm的水滴撞击管径为8.00mm的超疏水壁面时运动状态发生转变的临界条件。

英文摘要:

      The CLSVOF (Coupled Level Set and Volume of Fluid) method of phase interface tracking is used to investigate the evolution of droplet in super-hydrophobic tubular surface at different impact velocities. The results show that the dynamic characteristics for droplet impact tubular surfaces are influence by the initial velocities. When the impact velocity is small, the liquid film rebound in an overall form.With the increasing impact velocity is large enough, the liquid film disintegrated. In addition, the transform conditions of state of motion are given when a droplet with the velocity of 2.00m/s and the diameter of 2.58 mm impact on a super-hydrophobic surface with a diameter of 8.00 mm.