Role of the Dynamic Contact Angle on Splashing
Role of the Dynamic Contact Angle on Splashing
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DOI：
10.1103/physrevlett.122.228001
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发表时间：
2019-06-05
影响因子：
8.6
通讯作者：
Castrejon-Pita, J. Rafael
中科院分区：
文献类型：
--
作者：
Quetzeri-Santiago, Miguel A.;Yokoi, Kensuke;Castrejon-Pita, J. Rafael
在这封信中，我们研究的飞溅行为的液滴后，影响到各种基板上具有不同的润湿性能，从亲水性到超疏水性表面。特别是，我们研究了动态接触角对飞溅的影响。实验方法使用高速成像和图像分析来恢复作为铺展速度的函数的表观接触角。我们的研究结果表明，无论是毛细管数，也不是所谓的飞溅参数是适当的，在这些情况下的飞溅行为的特征。然而，我们表明，最大动态前进接触角和飞溅比β充分表征飞溅行为。
In this Letter, we study the splashing behavior of droplets upon impact onto a variety of substrates with different wetting properties, ranging from hydrophilic to superhydrophobic surfaces. In particular, we study the effects of the dynamic contact angle on splashing. The experimental approach uses high-speed imaging and image analysis to recover the apparent contact angle as a function of the spreading speed. Our results show that neither the Capillary number nor the so-called splashing parameter are appropriate to characterize the splashing behavior under these circumstances. However, we show that the maximum dynamic advancing contact angle and the splashing ratio beta adequately characterize the splashing behavior.