论文标题
在沉积在光滑基材上的液滴的聚结之前
Dimple drainage before the coalescence of a droplet deposited on a smooth substrate
论文作者
论文摘要
稀薄的液体或气膜在自然界中无处不在，从泡沫到自由表面的亚毫升气泡，它们的破裂会留下一小滴小滴和气泡。但是，负责这些电影破裂的机制仍在争论中。因此，本研究旨在了解薄膜的排水动力学，这些薄膜被毫米液滴和光滑的固体或液体薄膜之间的重力挤压。求解耦合的润滑方程并分析固体和液体膜病例中的主要术语，我们解释了为什么在液体膜情况下排水更快，通常导致较短的聚结时间，如最近的实验所示。
Thin liquid or gas films are everywhere in nature, from foams to submillimetric bubbles at a free surface, and their rupture leaves a collection of small drops and bubbles. However, the mechanisms at play responsible for the bursting of these films is still in debate. The present study thus aims at understanding the drainage dynamics of the thin air film squeezed by gravity between a millimetric droplet and a smooth solid or a liquid thin film. Solving coupled lubrication equations and analyzing the dominant terms in the solid and liquid film cases, we explain why the drainage is much faster in the liquid film case, leading often to a shorter coalescence time, as observed in recent experiments.
