Splashing impact of a single drop onto very thin liquid films
Splashing impact of a single drop onto very thin liquid films
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DOI：
10.1063/1.1287511
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发表时间：
2000-09-01
影响因子：
4.6
通讯作者：
Chen, CC
中科院分区：
文献类型：
--
作者：
Wang, AB;Chen, CC
液膜厚度为1毫米的顺序通常用于研究液滴冲击到润湿表面上。这是因为薄于1 mm的膜由于毛细管弯月面而难以产生和测量。在这项工作中，一种新的方法来生产薄膜的定义明确的厚度已经开发。提出了一种可靠的膜厚测定方法，其不确定度最小.新的飞溅现象被观察到的下降冲击到薄膜。据发现，临界飞溅水平（阈值韦伯数）是不敏感的膜厚度为一个给定的固体表面，如果薄膜是足够薄。临界飞溅高度随液体粘度的增大而增大。(C)2000年美国物理学会。【S1070-6631（00）00409-8】。
Liquid films with thicknesses on the order of 1 mm were commonly used for the study of drop impingement onto a wetted surface. This is because films thinner than 1 mm are difficult to generate and measure due to capillary meniscus. In this work a novel method to produce thin films of well-defined thickness has been developed. Also a reliable process with minimum uncertainty to determine film thickness was proposed. New splashing phenomena were observed for drop impact onto thin films. It is found that the critical splash level (the threshold Weber number) is insensitive to film thickness for a given solid surface if the film is sufficiently thin. It is also shown that the critical splash level increases with liquid viscosity. (C) 2000 American Institute of Physics. [S1070-6631(00)00409-8].