We investigate experimentally the different shapes taken by a water drop freezing during its impact on a cold surface. We show that these shapes are formed by a water film that remains on top of the first formed ice layer. The capillary hydrodynamics of this water film dewetting on its own ice, coupled with its vertical solidification, is thus quantitatively characterized, allowing us to understand and predict the formation of the emerging patterns. Finally, this experiment enables to study the contact angle dynamics, giving a deep insight into the wetting of water on ice.

中文翻译：

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在冰上收回和冻结水膜

我们实验研究水滴冻结在冷表面上时所采取的不同形状。我们显示出这些形状是由保留在第一个形成的冰层顶部的水膜形成的。因此，可以定量表征在自身冰上润湿的水膜的毛细流体动力学特性，以及其垂直凝固，从而使我们能够理解和预测新兴模式的形成。最后，该实验能够研究接触角动力学，从而深入了解水在冰上的润湿情况。