Drop impact onto inclined and moving surfaces are seen in various applications, for example, inkjet printing, spray coating, or in agriculture; droplets impact on either the surface that is moving, inclined, or a combination of both. Studies in the literature have examined the phenomenon of drop impact in isolation, either for a moving surface, or an inclined surface. Therefore, we conducted a comparative study for drop impact onto moving and inclined surfaces to see if they can be considered as equivalent systems. We used high speed imaging and examined the spreading and splashing of droplet impact onto both inclined and moving surfaces, having the same normal and tangential (in-plane) velocities. Various liquids with viscosities and surface tensions in the range of 1-5 cSt 17.4-72.8 mNm, respectively, were used. We demonstrated that both systems are equivalent to one another, considering either the initial spreading behavior of droplets, or splashing. Different types of splashing seen on inclined and moving surfaces are similar regardless of system. Finally, a new type of splashing named "split splashing" was also reported. This type of splashing is seen only when the normal velocity relative to tangential velocity is very low.

中文翻译：

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水滴对移动的表面和倾斜的表面的影响

在各种应用中，例如在喷墨印刷，喷涂或农业中，都可以看到水滴撞击在倾斜和活动的表面上。液滴撞击正在移动，倾斜或两者结合的表面。文献中的研究已经检查了在运动表面或倾斜表面上跌落冲击的孤立现象。因此，我们对跌落对移动和倾斜表面的影响进行了比较研究，看它们是否可以视为等效系统。我们使用高速成像技术，检查了液滴冲击在倾斜和移动表面上的散布和飞溅，它们具有相同的法向和切向（平面内）速度。使用粘度和表面张力分别在1-5 cSt 17.4-72.8 mNm范围内的各种液体。我们证明了这两种系统彼此等效，考虑了液滴的初始扩散行为或飞溅。无论系统如何，在倾斜表面和移动表面上看到的不同类型的飞溅都是相似的。最后，还报道了一种新型的飞溅，称为“分裂飞溅”。仅当法向速度相对于切向速度非常低时才能看到这种飞溅。