Breakup dynamics for droplet formation in shear-thinning fluids in a flow-focusing device

被引：36
|
作者：
Du, Wei [1 ]
Fu, Taotao [1 ]
Duan, Yingfeng [2 ]
Zhu, Chunying [1 ]
Ma, Youguang [1 ]
Li, Huai Z. [3 ]
机构：
[1] Tianjin Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Sch Chem Engn & Technol, State Key Lab Chem Engn, Tianjin 300072, Peoples R China
[2] Xian Univ Sci & Technol, Sch Chem & Chmical Engn, Xian 710054, Shaanxi, Peoples R China
[3] Univ Lorraine, CNRS, Lab React & Proc Engn, 1 Rue Grandville,BP 20451, F-54001 Nancy, France
来源：
CHEMICAL ENGINEERING SCIENCE | 2018年 / 176卷
关键词：
Microfluidics; Shear-thinning fluids; Droplet; Breakup; Interface; SNAP-OFF PROBLEM; PINCH-OFF; LIQUID THREADS; T-JUNCTION; VISCOSITIES;
D O I：
10.1016/j.ces.2017.10.019
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The breakup dynamics of the dispersed thread for droplet formation in shear-thinning fluids in a flow-focusing device was highlighted. The breakup process of the shear-thinning dispersed thread could be divided into four stages: the droplet growth stage and the squeezing stage, both of them are dominated by the squeezing pressure, the stretching stage controlled by the viscous stresses of dispersed phase and the surface tension, and the pinch-off stage controlled by the viscous stresses of both phases and the surface tension. The breakup dynamics of the dispersed thread for the shear-thinning fluids in each stage is very similar to that of the constant viscosity Newtonian liquids, signifying that the breakup is almost unaffected by the shear-thinning rheological properties. (C) 2017 Elsevier Ltd. All rights reserved.
引用
收藏
页码：66 / 76
页数：11
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