Compared with single droplet impact, multiple-droplet impact is more common in nature, and its dynamic process is more complicated. Based on the many-body dissipative particle dynamics with energy conservation method, we investigate the successive impact of droplets on the superhydrophobic surface at room temperature under different conditions, and observe five rebound modes, which are mainly determined by the interval time and Weber number. For the first time, the pancake-like rebound was found on a non-microstructure surface. As a universal rebound form, its contact time on solid surface was less than other rebound forms. By simulating the successive collision of two droplets at a specific Weber number, the time interval of the pancake-like rebound is obtained, and the mechanism of this characteristic form is analyzed from the aspect of surface energy change during the impact. Finally, by studying the impact of the supercooled droplet on the cold surface with different temperatures, it is verified that the pancake-like rebound mode is more conducive to the anti-icing of the surface.

中文翻译：

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液滴对超疏水表面的连续撞击

与单液滴撞击相比，多液滴撞击在自然界中更为常见，其动力学过程也更加复杂。基于能量守恒的多体耗散粒子动力学，我们研究了室温下不同条件下液滴对超疏水表面的连续撞击，观察到了五种反弹模式，这主要由间隔时间和韦伯数决定。首次在非微结构表面发现煎饼状回弹。作为一种通用的回弹形式，其在固体表面的接触时间比其他回弹形式要短。通过模拟两个液滴在特定韦伯数下的连续碰撞，得到了煎饼状反弹的时间间隔，并从碰撞过程中表面能变化的角度分析了这种特征形式的机理。最后，通过研究过冷液滴对不同温度冷表面的影响，验证了煎饼状回弹模式更有利于表面防冰。