Generation of droplets of shear-thinning non-Newtonian fluids in T-junction parallelized microchannels

被引：17

作者：

Wang, Zhongdong ^{[1
]}

Xiang, Xingyu ^{[1
]}

Zhu, Hongwei ^{[2
]}

Dong, Yanpeng ^{[1
]}

Zhu, Chunying ^{[1
]}

Ma, Youguang ^{[1
]}

Sun, Bing ^{[2
]}

Patlazhan, Stanislav A. ^{[3
,4
]}

Fu, Taotao ^{[1
]}

机构：

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

[2] SINOPEC Res Inst Safety Engn Co Ltd, 339 Songling Rd, Qingdao 266071, Peoples R China

[3] Russian Acad Sci, N N Semenov Fed Res Ctr Chem Phys, Kosygin St 4, Moscow 119991, Russia

[4] Russian Acad Sci, Fed Res Ctr Problems Chem Phys & Med Chem, Academician Semenov Ave 1, Chernogolovka 142432, Moscow, Russia

来源：

CHEMICAL ENGINEERING JOURNAL | 2023年 / 471卷

基金：

中国国家自然科学基金;

关键词：

Microchannel; Droplet; Shear-thinning non-Newtonian fluid; Numbering-up; Complex fluids; MULTIPHASE FLOW; PRESSURE-DROP; DESIGN; MICROFLUIDICS; BUBBLES;

D O I：

10.1016/j.cej.2023.144303

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The study of shear-thinning non-Newtonian fluids in T-junction parallelized microchannels provides valuable insights into the emulsification process and droplet generation synchronicity. Silicone oil is used as the continuous phase, and sodium carboxymethyl cellulose (CMC) aqueous solutions are used as the dispersed phase. Based on the evolution of the dispersed phase head and neck characteristic size, the droplet generation is classified into four stages: the waiting stage, filling stage, necking stage, and pinch-off stage. The effects of the two-phase flow rates and rheological characteristics of shear-thinning fluids on the four stages are investigated. Additionally, the coupling of interface evolution between parallelized microchannels is studied, revealing periodic changes between synchronous and asynchronous droplet generation types. The impact of this phenomenon on droplet monodispersity is analyzed, providing crucial information for the preparation of uniform droplets.

引用

页数：13

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