飞溅
跌落冲击
下降(电信)
薄膜
毛细管作用
液滴
固体表面
润湿
物理
韦伯数
弯月面
光学
机械
复合材料
材料科学
纳米技术
热力学
湍流
机械工程
雷诺数
工程类
入射(几何)
化学物理
作者
Anbang Wang,Chi‐Chang Chen
出处
期刊:Physics of Fluids
[American Institute of Physics]
日期:2000-09-01
卷期号:12 (9): 2155-2158
被引量:233
摘要
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.
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