In this study we implemented the network simulation techniques using macromodels (lumped models) for capillary driven flows in microfluidic networks. The flow characteristics in a flow junction, such as meniscus stretching and bifurcation, were studied and their effects on filling time as well as pressure drop were explored for various network configurations. The results from the network simulator are validated numerically using computational fluid dynamics (CFD) simulations by employing the volume-of-fluids (VOF) method. The predictions by the network simulator for free-surface flows in different microfluidic networks were found to be in good agreement with the results obtained from the VOF simulations for filling time and meniscus position.
Issue Section:
Technical Briefs
References
1.
Jian
, S.
, and Lin
, M.
, 2006, “Effect of Smooth Microchannel Cross Section Shape on Friction Factor
,” 1st IEEE International Conference on Nano/Micro Engineered and Molecular Systems
, Zhuhai, China
, Jan. 18–21.2.
Banerjee
, D.
, 2005, “Experimental Validation of Macromodels for Simulating Capillary Driven Multi-Phase Flows Used for Microchamber Filling
,” Proceedings of INTERPACK2005, The ASME/Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS and Electronic Systems
, San Francisco, CA
, Jul. 17–22, INTERPACK2005-73412.3.
Bourouina
, T.
, and Grandchamp
, J.
, 1996, “Modeling Micropumps with Electrical Equivalent Networks
,” J. Micromech. Microeng.
, 6
, pp. 398
–404
. 4.
Chatterjee
, A. N.
, and Aluru
, N. R.
, 2005, “Combined Circuit/Device Modeling and Simulation of Integrated Microfluidic Systems
,” J. Microelectromech. Syst.
, 14
(1
), pp. 81
–95
. 5.
Banerjee
, D.
, Amro
, N. A.
, and Fragala
, J.
, 2005, “Optimization of Microfluidic Ink-Delivery Apparatus for Dip Pen Nanolithography™
,” SPIE J. Microlith., Microfab. and Microsyst
, 4
, pp. 023014
–023021
. 6.
White
, F. M.
, 2003, Fluid Mechanics
, McGraw-Hill
, New York
.7.
Saha
, A. A.
, and Mitra
, S. K.
, 2008, Recent Advances in Modeling and Simulation: Chap 17 Modeling and Simulation of Microscale Flow
, InTech Education and Publishing
, Austria
.8.
Sikalo
, S.
, Wilhelm
, H. D.
, Roisman
, I. V.
, Jakirlic
, S.
, and Tropea
, C.
, 2005, “Dynamic Contact Angle of Spreading Droplets: Experiments and Simulations
,” Phys. Fluids
, 17
, pp. 062103
. 9.
Saha
, A. A.
, and Mitra
, S. K.
, 2009, “Effect of Dynamic Contact Angle in a Volume of Fluid (VOF) Model for a Microfluidic Capillary Flow
,” J. Colloid Interface Sci.
, 339
, pp. 461
–480
. 10.
Banerjee
, D.
, 2005, “Investigation of Volume of Fluids (VOF) Method and System Models for Design of Microfluidic Ink Delivery Apparatus for Dip Pen Nanolithography (DPN)
,” Nano Science and Technology Institute (NSTI) Nanotechnology 2005/NanoBio2005
, Anaheim, CA, May 10–12, Vol. 1
, pp. 680
–683
.11.
Chakrabarty
, K.
, and Zeng
, J.
, 2005, “Design Automation for Microfluidics-Based Biochips
,” J. Emerging Technol. Comput. Syst.
, 1
(3
), pp. 186
–223
. 12.
Wang
, K.-L.
, and Jones
, T. B.
, 2005, “Saturation Effects in Dynamic Electrowetting
,” Appl. Phys. Lett.
, 86
, pp. 054104
. 13.
Saha
, A. A.
, and Mitra
, S. K.
, 2009, “Numerical Study of Capillary Flow in Microchannels with Alternate Hydrophilic-Hydrophobic Bottom Wall
,” ASME J. Fluids Eng.
, 131
(6
), pp. 061202
. 14.
Washburn
, E. W.
, 1921, “The Dynamics of Capillary Flow
,” Phys. Rev.
, 27
(3
), pp. 273
–283
. 15.
Lucas
, V. R.
, 1918, “Uber das Zeitgesetz des Kapillaren Aufstiegs von Flussigkeiten
,” Kolloid. Zh.
, 23
, pp. 15
–22
. 16.
Hamaraoui
, A.
, and Nylander
, T.
, 2002, “Analytical Approach for the Lucas–Washburn Equation
,” J. Colloid Interface Sci.
, 250
, pp. 415
–421
. 17.
Zhmud1
, B. V.
, Tiberg
, F.
, and Hallstensson
, K.
, 2000, “Dynamics of Capillary Rise
,” J. Colloid Interface Sci.
, 228
, pp. 263
–269
. 18.
Friesa
, N.
, and Dreyer
, M.
, 2008, “An Analytic Solution of Capillary Rise Restrained by Gravity
,” J. Colloid Interface Sci.
, 320
(1
), pp. 259
–263
. 19.
Friesa
, N.
, and Dreyer
, M.
, 2008, “The Transition from Inertial to Viscous Flow in Capillary Rise
,” J. Colloid Interface Sci.
, 327
(1
), pp. 125
–128
. 20.
Martic
, G.
, Gentner
, F.
, Seveno
, D.
, Coulon
, D.
, and De Coninck
, J.
, 2002, “A Molecular Dynamics Simulation of Capillary Imbibition
,” Langmuir
, 18
, pp. 7971
–7976
. Copyright © 2011
by American Society of Mechanical Engineers
You do not currently have access to this content.
