Thin-film profile around long bubbles in square microchannels measured by chromatic interference method

被引：18

作者：

Chen, Haosheng ^{[1
]}

Li, Zhongnan ^{[1
]}

Li, Jiang ^{[2
]}

机构：

[1] Tsinghua Univ, State Key Lab Tribol, Beijing 100084, Peoples R China

[2] Univ Sci & Technol Beijing, Sch Mech Engn, Beijing 100083, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2016年 / 109卷 / 04期

关键词：

MICROFLUIDICS; DROPLETS; DYNAMICS; MOTION;

D O I：

10.1063/1.4959791

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

To study the thin lubrication film around long bubbles with length-to-radius aspect ratio more than 10 in square capillaries, a chromatic interference method was developed. Three-dimensional profile of the lubrication film was acquired from moving long bubbles with the length-to-radius aspect ratio up to 500. The dynamics and profiles of the film were found to be dependent of the dimension-less downstream distance x of the long bubble. For 1 << x << Ca-1, the film has a thickness of order Ca-2/3 at the center and order Ca 1 at the sides, while for x similar to Ca-1, the film at the sides thins to order Ca-4/3, which matches well with the existing theoretical results. Published by AIP Publishing.

引用

页数：4

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