论文标题
散布液滴影响球体的动力学
Spreading dynamics of a droplet impacting a sphere
论文作者
论文摘要
在自然界中，高速降雨量通常会影响并扩散在弯曲的表面上，例如树叶。尽管对表面的影响是工业应用的传统话题，但在自然情况下弯曲表面上的降低影响动态鲜为人知。在本研究中，我们检查了滴在弯曲的疏水表面上的时间依赖性扩散动力学。我们还观察到，弯曲表面上的滴相于在平坦的表面上扩散。为了了解扩散动态，基于音量保存和时间能量平衡而开发了一个新的分析模型。该模型在早期阶段和液滴冲击的最后阶段收敛到先前的模型。我们将新模型与各种弯曲表面和冲击速度上测得的扩展长度进行了比较，这导致了良好的一致性。
In nature, high-speed rain drops often impact and spread on curved surfaces e.g. tree leaves. Although a drop impact on a surface is a traditional topic for industrial applications, drop-impact dynamics on curved surfaces in natural situations are less known about. In the present study, we examine the time-dependent spreading dynamics of a drop onto a curved hydrophobic surface. We also observed that a drop on a curved surface is spreads farther than one on a flat surface. To understand the spreading dynamics, a new analytical model is developed based on volume conservation and temporal energy balance. This model converges to previous models at the early stage and in the final stage of droplet impact. We compared the new model with measured spreading lengths on various curved surfaces and impact speeds, which resulted in good agreement.
