论文标题
被影响的液滴的冷冻模式：从锥形尖端到环形形状
Frozen Patterns of Impacted Droplets: From Conical Tips to Toroidal Shapes
论文作者
论文摘要
我们报告了通过快速图像对冷基板影响冷基材的水滴的冷冻模式。这些模式可以通过几个物理参数（液滴大小，高度下降和底物温度）来操纵，并且比例分析与相图具有显着的一致性。观察到的双重环形形状归因于影响动态与冻结过程之间的相关性，这是通过液滴温度的时空演化确认的，这是与形态和固化相关的确定的时间表（$ t_ {inn} \ simeq \ simeq _ {sol} $）和冰界模型。这些对冷冻模式的结果提供了对快速影响流体动力学，瞬态传热和复杂的固化过程的复杂相互作用的洞察力。
We report frozen patterns for the water droplets impacting on a cold substrate through fast-speed images. These patterns can be manipulated by several physical parameters (the droplet size, falling height, and substrate temperature), and the scaling analysis has a remarkable agreement with the phase diagram. The observed double-concentric toroidal shape is attributed to the correlation between the impacting dynamics and freezing process, as confirmed by the spatiotemporal evolution of the droplet temperature, the identified timescale associated with the morphology and solidification ($t_{inn}\simeq τ_{sol}$), and the ice front-advection model. These results for frozen patterns provide insight into the complex interplay of the rapid impacting hydrodynamics, the transient heat transfer, and the intricate solidification process.
