Bubble Formation in Yield Stress Fluids Using Flow-Focusing and T-Junction Devices

被引：15

作者：

Laborie, Benoit ^{[1
,2
]}

Rouyer, Florence ^{[3
]}

Angelescu, Dan E. ^{[2
,4
]}

Lorenceau, Elise ^{[1
]}

机构：

[1] Univ Paris Est, ENPC ParisTech, IFSTTAR, CNRS,Lab Navier,UMR 8205, F-77420 Champs Sur Marne, France

[2] Univ Paris Est, ESIEE Paris, ESYCOM, F-93162 Noisy Le Grand, France

[3] Univ Paris Est, ENPC ParisTech, IFSTTAR, CNRS,Lab Navier,UMR 8205, F-77454 Marne La Vallee, France

[4] Fluidion, F-75001 Paris, France

来源：

PHYSICAL REVIEW LETTERS | 2015年 / 114卷 / 20期

关键词：

MONODISPERSE DOUBLE EMULSIONS; NON-NEWTONIAN FLUIDS; DROPLET MICROFLUIDICS; BREAKUP; DISPERSIONS; DYNAMICS; GENERATION; LIQUIDS; NETWORK; CHANNEL;

D O I：

10.1103/PhysRevLett.114.204501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the production of bubbles inside yield stress fluids (YSFs) in axisymmetric T-junction and flow-focusing devices. Taking advantage of yield stress over capillary stress, we exhibit a robust break-up mechanism reminiscent of the geometrical operating regime in 2D flow-focusing devices for Newtonian fluids. We report that when the gas is pressure driven, the dynamics is unsteady due to hydrodynamic feedback and YSF deposition on the walls of the channels. However, the present study also identifies pathways for potential steady-state production of bubbly YSFs at large scale.

引用

页数：5

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