论文标题
双液滴的三维研究对润湿性表面影响
Three-dimensional study of double droplets impact on a wettability-patterned surface
论文作者
论文摘要
根据三维多释放时间伪电势Boltzmann模型，研究了两个液滴同时影响具有润湿性差异的平坦表面的方向运动和反弹行为。详细研究了几种因素的影响，例如润湿性差异，韦伯数量和液滴间距对方向运动和反弹行为的影响。数值结果表明，由润湿差异引起的不平衡的年轻力将导致液滴反弹或横向向侧面迁移，而表面上的疏水性较低，并且发现液滴的接触时间随着润湿差的增加而减小。此外，注意到在较低的韦伯人数的情况下，存在二次扩散行为，进而导致接触时间增加。此外，就液滴间距的影响而言，我们发现，液滴的合并强度随液滴间距的增加而降低，尤其是，发现合并的液滴被发现分成两个在呈差异收缩过程中分为两个亚drop，然后定义了三个脱离模式以揭示掉落掉落的效果。
The directional movement and rebound behaviours of two droplets simultaneously impacting a designed flat surface with wettability difference is investigated based on the three-dimensional multi-relaxation-time pseudopotential lattice Boltzmann model. The effects of several factors, such as wettability difference, Weber number and droplet spacing on the directional movement and rebound behaviours are investigated in detail. The numerical results show that the unbalanced Young 's force caused by the wetting difference will cause the droplets to rebound or migrate laterally toward to the side with lower hydrophobicity on the surface, and the contact time of the droplets is found to decrease with the increase of the wetting difference. In addition, it is noted that there exists a secondary spreading behavior in the case of a lower Weber number, which in turn leads to an increase in contact time. Further, as far as the influence of the droplet spacing is concerned, we found that the coalescence intensity of the droplets decreases with the increase of droplet spacing, and in particular, the coalescing droplets are found to divide into two sub-droplets during asymmetric contraction, and three detachment patterns are then defined to reveal the effects of the droplet spacing.
