In the last ten years, advances in experimental techniques have enabled remarkable discoveries of how the dynamics of thin gas films can profoundly influence the behavior of liquid droplets. Drops impacting onto solids can skate on a film of air so that they bounce off solids. For drop–drop collisions, this effect, which prevents coalescence, has been long recognized. Notably, the precise physical mechanisms governing these phenomena have been a topic of intense debate, leading to a synergistic interplay of experimental, theoretical, and computational approaches. This review attempts to synthesize our knowledge of when and how drops bounce, with a focus on ( a) the unconventional microscale and nanoscale physics required to predict transitions to/from merging and ( b) the development of computational models. This naturally leads to the exploration of an array of other topics, such as the Leidenfrost effect and dynamic wetting, in which gas films also play a prominent role.

中文翻译：

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液滴动力学中的气体缩微胶片：液滴何时反弹？


在过去的十年中，实验技术的进步使人们发现了薄气体薄膜的动力学如何深刻影响液滴的行为。撞击固体的液滴会在空气膜上滑行，从而使它们从固体上反弹。对于拖放碰撞，这种阻止合并的效果早已得到认可。值得注意的是，支配这些现象的确切物理机制一直是一个激烈争论的话题，导致了实验、理论和计算方法的协同相互作用。本综述试图综合我们对液滴何时以及如何反弹的知识，重点是 （a） 预测合并过渡所需的非常规微观和纳米级物理学，以及 （b） 计算模型的开发。这自然导致了对一系列其他主题的探索，例如莱顿弗罗斯特效应和动态润湿，其中气体薄膜也发挥着重要作用。