Bubble formation in high-viscosity liquids in step-emulsification microdevices

被引：5

作者：

Mi, Sheng ^{[1
]}

Zhu, Chunying ^{[1
]}

Ma, Youguang ^{[1
]}

Fu, Taotao ^{[1
]}

机构：

[1] Tianjin Univ, Sch Chem Engn & Technol, State Key Lab Chem Engn, Tianjin 300072, Peoples R China

来源：

JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY | 2022年 / 114卷

基金：

中国国家自然科学基金;

关键词：

Step; -emulsification; Bubble; Viscous fluids; Interfacial phenomenon; Microfluidics; BREAKUP DYNAMICS; FLOW; GENERATION; MICROFLUIDICS; PRESSURE; CHANNELS; DEVICES;

D O I：

10.1016/j.jiec.2022.07.012

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Bubble formation in high-viscosity liquids in step-emulsification microdevices is presented. Nitrogen is used as the dispersed phase. Glycerol aqueous solutions with concentration more than 60% (w/w) are used as the continuous phase to show the effect of high viscosity liquid. It was found that the transition of flow patterns of gas & ndash;liquid two-phase flow can be divided into two categories: bubbly flow and parallel flow. Compared with the cases in low viscosity liquid, the wettability with wall was deteriorated and the resistance in chamber were enhanced, greatly. All of these effects cause different performance of interface evolution during bubble formation and the volume and formation frequency after pinching off. Therefore, the relative magnitude of pressure variation between chamber and gas inlet was changed to affect the flow pattern and monodispersity when the operation conditions were changed. (c) 2022 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

引用

页码：221 / 232

页数：12

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