论文标题
微结构表面上的液滴振动引起的致动
Vibration-induced actuation of droplets on microstructured surfaces
论文作者
论文摘要
当液滴用不对称拓扑影响振动的微型结构表面时，液体在弹跳过程中进行水平运动。当液体与低表面能表面（例如疏水性）和宽幅度和频率范围接触时，观察到移动效果。我们建议液滴的运动方向是由由于不对称几何形状引起的固体与液体接触之间不平衡的蒸气流动的力驱动的。我们观察到液滴影响振动的微型结构表面的悬浮和运动动力学，以揭示导致移动，无动和液滴损坏的过程，随着振动幅度和频率的增加。基于实验提供的洞察力以及对液滴的动能的分析，我们为动态运动及其对振动特性的依赖性开发了定量模型。
When a liquid droplet impacts a vibrated micro-structured surface with asymmetric topology, the liquids perform a horizontal motion during its bouncing. The moving effect is observed when the liquid is in contact with a low surface energy surface (e.g. hydrophobic) and over a wide amplitude and frequency range. We propose that the motion direction of liquid droplets is driven by a force exerted by the unbalanced vapor flow between the contact of solid and the liquid due to the asymmetric geometry. We observe the levitation and movement dynamics of the droplet impacting on a vibrated micro-structured surface to reveal the processes responsible for the transitional regime between the moving, unmoved, and broken droplet as the vibration amplitude and frequency increases. Based on the insight provided by the experiment and on the analysis of the kinetic energy of the droplet, we develop a quantitative model for the dynamic movement and its dependence on the vibration characteristics.
