A parametric study of droplet deformation through a microfluidic contraction: Low viscosity Newtonian droplets

被引：39

作者：

Harvie, D. J. E. ^{[1
]}

Davidson, M. R.

Cooper-White, J. J.

Rudman, M.

机构：

[1] Univ Melbourne, Dept Chem & Biomol Engn, Parkville, Vic 3052, Australia

[2] Univ Queensland, Div Chem Engn, St Lucia, Qld 4067, Australia

[3] CSIRO, Mfg & Infrastruct Technol, Melbourne, Vic 3001, Australia

来源：

CHEMICAL ENGINEERING SCIENCE | 2006年 / 61卷 / 15期

基金：

澳大利亚研究理事会;

关键词：

microfluidics; computational fluid dynamics (CFD); volume of fluid (VOF); contraction; droplet;

D O I：

10.1016/j.ces.2006.03.011

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Numerical simulations are conducted to investigate how a droplet of Newtonian liquid. entrained in a higher viscosity Newtonian liquid, behaves when passing through an axisymmetric microfluidic contraction. Simulations are performed using a transient Volume of Fluid finite volume algorithm, and cover ranges of Reynolds and Weber numbers relevant to microfluidic flows. Results are presented for a droplet to surrounding fluid viscosity ratio of 0.001. In contrast to behaviour at higher viscosity ratios obtained previously by the authors, shear and interfacial tension driven instabilities often develop along the droplet Surface. leading to complex shape development, and in some instances, droplet breakup. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：5149 / 5158

页数：10

共 27 条

[1] Numerical prediction of extensional flows in contraction geometries: hybrid finite volume/element method [J].

Aboubacar, M ;

Matallah, H ;

Tamaddon-Jahromi, HR ;

Webster, MF .

JOURNAL OF NON-NEWTONIAN FLUID MECHANICS, 2002, 104 (2-3) :125-164

[2] Formation of dispersions using "flow focusing" in microchannels [J].

Anna, SL ;

Bontoux, N ;

Stone, HA .

APPLIED PHYSICS LETTERS, 2003, 82 (03) :364-366

[3] STABILITY OF A THIN ANNULAR FILM IN PRESSURE-DRIVEN, LOW-REYNOLDS-NUMBER FLOW THROUGH A CAPILLARY [J].

AUL, RW ;

OLBRICHT, WL .

JOURNAL OF FLUID MECHANICS, 1990, 215 :585-599

[4] A CONTINUUM METHOD FOR MODELING SURFACE-TENSION [J].

BRACKBILL, JU ;

KOTHE, DB ;

ZEMACH, C .

JOURNAL OF COMPUTATIONAL PHYSICS, 1992, 100 (02) :335-354

[5]

DAVIDSON MR, 2006, IN PRESS APPL MATH M

[6]

DAVIDSON MR, 2004, 5 INT C MULT FLOW IC

[7]

Davis C, 2005, MASS REV, V46, P47

[8] Nonlinear dynamics and breakup of free-surface flows [J].

Eggers, J .

REVIEWS OF MODERN PHYSICS, 1997, 69 (03) :865-929

[9] Formation of monodisperse bubbles in a microfluidic flow-focusing device [J].

Garstecki, P ;

Gitlin, I ;

DiLuzio, W ;

Whitesides, GM ;

Kumacheva, E ;

Stone, HA .

APPLIED PHYSICS LETTERS, 2004, 85 (13) :2649-2651

[10]

Harvie D., 2004, 15 AUSTR FLUID MECH

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