This report investigates how different splashing mechanisms affect the oblique splash threshold of drops impacting a dry solid surface. The splashing behaviors of water, ethanol, and a water/ethylene glycol solution are observed over a wide range of drop diameters (0.7 mm < D < 2.2 mm) and Weber numbers (10 < We < 1040), and several published models are tested in order to predict the thresholds between deposition, one-sided splashing, and two-sided splashing. We found that the splash threshold of liquids that exhibit the corona splashing mechanism can be readily predicted by existing models. However, for liquids such as water that exhibit prompt splashing, the oblique splash threshold is not successfully predicted by any presently established correlation. Hence, our findings identify a critical knowledge gap in the drop impact field, since the behavior of water is of fundamental importance to countless engineering problems. Finally, combining our own results with others reported in the literature, we address some contradictory reports about the influence of liquid viscosity on the splash threshold and demonstrate that the presence or lack of thin-sheet in different experiments could explain the contradictions present in the literature.

中文翻译：

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液体性质对液滴斜溅阈值的影响

本报告研究了不同的飞溅机制如何影响撞击干燥固体表面的液滴的倾斜飞溅阈值。在大范围的液滴直径 (0.7 mm < D < 2.2 mm) 和韦伯数 (10 < We < 1040) 上观察到水、乙醇和水/乙二醇溶液的飞溅行为，并测试了几个已发布的模型以预测沉积、一侧飞溅和两侧飞溅之间的阈值。我们发现，现有模型可以很容易地预测表现出电晕飞溅机制的液体的飞溅阈值。然而，对于表现出迅速飞溅的液体，例如水，任何目前建立的相关性都无法成功预测倾斜飞溅阈值。因此，我们的发现确定了跌落影响领域的关键知识差距，因为水的行为对无数工程问题至关重要。最后，将我们自己的结果与文献中报道的其他结果相结合，我们解决了一些关于液体粘度对飞溅阈值影响的相互矛盾的报告，并证明不同实验中薄片的存在或缺乏可以解释文献中存在的矛盾.