Measurement of surface tension of liquid microdroplets through observation of droplet collision

被引：16
|
作者：
Hayakawa, Daichi [1 ,2 ]
Hirano, Taichi [1 ]
Mitani, Shujiro [1 ]
Sakai, Keiji [1 ,2 ]
机构：
[1] Univ Tokyo, Inst Ind Sci, Meguro Ku, Tokyo 1538505, Japan
[2] Univ Tokyo, Fac Engn, Dept Appl Phys, Bunkyo Ku, Tokyo 1338656, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2017年 / 56卷 / 07期
基金：
日本科学技术振兴机构;
关键词：
MICROCAPSULES; SEPARATION;
D O I：
10.7567/JJAP.56.07JB02
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigate the applicability of measuring surface tension of liquid microdroplets by analyzing their oscillatory behavior induced by droplet collision. The eigenfrequency of droplet oscillation reflects surface tension for small-amplitude oscillation. In this study, the oscillation frequencies of ethanol-ethanol and water-water droplet collisions are measured by direct observation. We experimentally verify that surface tension can be measured for deformation smaller than 10% of the droplet radius. The collision between ethanol-water droplets is also analyzed. The eigenfrequency induced by unlike-droplet collision exhibits a peculiar behavior, which may be attributed to the temporal hybrid structure of a combined droplet. (C) 2017 The Japan Society of Applied Physics.
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页数：3
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