The transitional regime between coalescing and splashing drops
The transitional regime between coalescing and splashing drops
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DOI：
10.1017/s0022112096001267
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发表时间：
1996-01
影响因子：
3.7
通讯作者：
M. Rein
中科院分区：
文献类型：
--
作者：
M. Rein
落入深层液体中的液滴可以与接收液体合并并形成涡环或飞溅。实际发生哪种现象取决于冲击条件。当冲击条件逐渐改变时，聚结和飞溅之间的过渡通过许多中间步骤进行。这些是通过水滴对平面水面的正常冲击的高速摄影来研究的。详细讨论了过渡制度中出现的不同流动的特征以及导致这些流动的可能机制。考虑的现象包括厚射流的上升和高升薄射流从撞击坑中喷出、气泡夹带、陨石坑动力学、冠形成和飞溅液滴的产生。最后，对过渡政权的现象特征进行了分类。
A drop that falls into a deep liquid can either coalesce with the receiving liquid and form a vortex ring or splash. Which phenomenon actually occurs depends on the impact conditions. When the impact conditions are gradually changed the transition between coalescence and splashing proceeds via a number of intermediate steps. These are studied by means of high-speed photography of the normal impact of water drops on a plane water surface. The characteristics of different flows that appear in the transitional regime and possible mechanisms causing these flows are discussed in detail. The phenomena considered include the rise of thick jets and the ejection of high-rising thin jets out of the impact crater, the entrainment of gas bubbles, crater dynamics, crown formation and the generation of splash droplets. Finally, a classification of the phenomena characteristic of the transitional regime is given.