Coalescence-induced jumping of unequal-sized droplets on superhydrophobic surfaces
Coalescence-induced jumping of unequal-sized droplets on superhydrophobic surfaces
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DOI：
10.1063/5.0165221
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发表时间：
2023-11
期刊：
影响因子：
1.6
通讯作者：
Ting-en Huang;Peng Zhang
中科院分区：
文献类型：
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作者：
Ting-en Huang;Peng Zhang
在本研究中，进行了数值研究，以探索两个不同尺寸的液滴在超疏水表面上聚结所引发的跳跃行为，以深入了解跳跃行为和物理机制，这有助于提高超疏水表面在与液滴行为操纵相关的各种应用中的性能。结果表明，起跳时刻接触角为180°时的向上质心速度比169°时小14.2%。然而，当小液滴的半径从 200 µm 减小到 50 µm 时，其尺寸增大了约 45.8%。当质心高度高于根据两个聚结液滴的总体积估计的球体半径并且当聚结液滴具有向上速度时，发生跳跃。
In this study, a numerical investigation is conducted to explore the jumping behavior triggered by the coalescence of two droplets of different sizes on a superhydrophobic surface for a deep understanding of the jumping behavior and physical mechanisms, which can contribute to improving the performance of superhydrophobic surfaces for various applications relevant to the manipulation of droplet behavior. The results show that the upward centroidal velocity at a contact angle of 180° is 14.2% smaller than that at 169° at the jump-off moment. However, it is about 45.8% larger as the radius of the small droplet decreases from 200 to 50 µm. The jump-off occurs when the centroidal height is higher than the radius of the sphere estimated from the summed volumes of two coalesced droplets and when the coalesced droplet is with an upward velocity.