Drop splashing is independent of substrate wetting
Drop splashing is independent of substrate wetting
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DOI：
10.1063/1.5012529
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发表时间：
2018-02-01
影响因子：
4.6
通讯作者：
de Pablo, Juan J.
中科院分区：
文献类型：
--
作者：
Latka, Andrzej;Boelens, Arnout M. P.;de Pablo, Juan J.
具有足够动能的液滴撞击干燥固体表面将飞溅，分裂成许多次级液滴。这种现象与强制润湿有许多相似之处，包括在接触线处夹带空气。由于这些相似性和事实上，强制润湿已被证明取决于表面的润湿性能，现有的理论预测飞溅取决于润湿性能以及。然而，使用高速干涉成像，我们观察到，在高毛细数润湿性能没有影响飞溅的各种液体表面组合。此外，通过充分解决的Navier-Stokes方程的长度和时间尺度上无法访问的实验，我们发现，在接触线/液滴的边缘的空气-液体界面的形状和运动是独立的润湿性。我们用这些发现来评估现有的理论和比较飞溅与强迫润湿。由AIP出版社出版。
A liquid drop impacting a dry solid surface with sufficient kinetic energy will splash, breaking apart into numerous secondary droplets. This phenomenon shows many similarities to forced wetting, including the entrainment of air at the contact line. Because of these similarities and the fact that forced wetting has been shown to depend on the wetting properties of the surface, existing theories predict splashing to depend on wetting properties as well. However, using high-speed interference imaging, we observe that at high capillary numbers wetting properties have no effect on splashing for various liquid-surface combinations. Additionally, by fully resolving the Navier-Stokes equations at length and time scales inaccessible to experiments, we find that the shape and motion of the air-liquid interface at the contact line/edge of the droplet are independent of wettability. We use these findings to evaluate existing theories and to compare splashing with forced wetting. Published by AIP Publishing.