Paper Titles

Effect of Nanoparticle Concentration on Thermo-Hydraulic Behavior of a Nanofluid in a Horizontal Tube with Constant Heat Flux and Mass Flow Rate
p.3650

Numerical Study of Laminar Mixed Convection of a Nanofluid in a Horizontal Curved Tube with Constant Heat Flux and Mass Flow Rate
p.3657

Analytical Solution of Electrokinetics Driven Flow in a Nanotube with Power Law Fluid by HPM
p.3663

Al₂O₃-Water Nanofluids in Convective Heat Transfer
p.3667

Breakup of Droplets in Micro and Nanofluidic T-Junctions
p.3673

Mixed Convective Heat Transfer Flow of Nanofluid past a Permeable Vertical Flat Plate with Magnetic Effects: A Finite Element Study
p.3679

Modeling and Simulation of Controlled Manipulation by AFM Nano Robot
p.3688

Micro Electrochemical Machining of Tungsten Carbide
p.3696

Prediction for Constitutive Relationship of Metallic Rubber with Various Parameters by BP Neural Net
p.3705

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 110-116Breakup of Droplets in Micro and Nanofluidic...

Breakup of Droplets in Micro and Nanofluidic T-Junctions

Article Preview

Abstract:

We employ numerical simulations to investigate the breakup of droplets in micro-and nanoscale T junctions which are used to produce small droplets from a large droplet. A Volume Of Fluid (VOF) method was used and for verifying the accuracy of simulation the results compared with two analytical researches. Our results reveal that breakup time and breakup length of the droplets play important roles in handling these systems optimally. Our results also indicate that for nanoscale T-junctions by increasing the capillary number the performance increases while for the micro-scale systems there is a specific capillary number for which the system is in its optimum condition.

You might also be interested in these eBooks

Mechanical and Aerospace Engineering, ICMAE2011

Info:

Periodical:

Applied Mechanics and Materials (Volumes 110-116)

Pages:

3673-3678

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.110-116.3673

Citation:

Cite this paper

Online since:

October 2011

Authors:

Ahmad Bedram, Ali Moosavi

Keywords:

Component, Droplet Generation, Micro T-Junctions, Nano T-Junctions, Reduction of Cost, Simulation

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2012 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] Tice J, Song H, Lyon A, Ismagilov R, (2003), Formation of droplets and mixing in multiphase microfluidics at low values of the Reynolds and the capillary numbers, Langmuir 19: 91273–9133.

DOI: 10.1021/la030090w

[2] M. A. Burns, B. N. Johnson, S. N. Brahmasandra, K. Handique, J. R. Webster, M. Krishnan, T. S. Sammarco, P. M. Man, D. Jones, D. Heldsinger, C. H. Mastrangelo, D. T. Burke, (1998).

DOI: 10.1126/science.282.5388.484

[3] Cristini V, Tan Y, (2004), Theory and numerical simulation of droplet dynamics in complex flows-a review, Lab Chip 4: 25.

DOI: 10.1039/b403226h

[4] M. Prakash, and N. Gershenfeld, (2007), Microfluidic bubble logic, Science, 315, 832.

DOI: 10.1126/science.1136907

[5] O. Sybulski, P. Garstevki, (2010), Dynamic memory in a microfluidic system droplets traveling through a simple network of microchannels, Lab on a chip, 4, 484.

DOI: 10.1039/b912988j

[6] S. Sugiura, M. Nakajima, S. Iwamoto, and M. Seki, (2001), Interfacial tension driven monodispersed droplet formation from microfabricated channel array, Langmuir 17, 5562.

DOI: 10.1021/la010342y

[7] A. M. Ganan-Calvo, (1998), Generation of Steady Liquid Microthreads and Micron-Sized Monodisperse Sprays in Gas Streams, Phys Rev Lett. 80, 285.

DOI: 10.1103/physrevlett.80.285

[8] T. Thorsen, R.W. Roberts, F. H. Arnold, and S. R. Quake, (2001), Dynamic pattern formation in a vesicle-generating microfluidic device, Phys. Rev. Lett. 86, 4163.

DOI: 10.1103/physrevlett.86.4163

[9] S. L. Anna, N. Bontoux, and H. A. Stone, (2003), Formation of dispersions using flow focusing in microchannels, Appl. Phys. Lett. 82, 364.

DOI: 10.1063/1.1537519

[10] D. R. Link, S. L. Anna, D. A. Weitz, and H. A. Stone, (2004), Geometrically Mediated Breakup of Drops in Microfluidic Devices, DOI: 10. 1103, Phys Rev Lett . 92. 054503.

DOI: 10.1103/physrevlett.92.054503

[11] P. Urbant, A. Leshansky, and Yu. Halupovich, (2008), On the forced convective heat transport in a droplet-laden flow in microchannels, Microfluid. Nanofluid. 4, 533.

DOI: 10.1007/s10404-007-0211-2

[12] P. Urbant, (2006), Numerical simulations of drops in microchannels, M. Sc. thesis, Technion.

[13] R. Gupta, D. F. Fletcher, and B. S. Haynes, (2009), On the CFD modeling of Taylor flow in microchannels , Chemical Engineering Science 64, 2941-2950.

DOI: 10.1016/j.ces.2009.03.018

[14] Ahmad Bedram, Ali Moosavi, (2010), Numerical Investigation of droplets breakup in microfluidic T-junction, International Conference on Physics Science and Technology ICPST, Hong Kong, China, Paper ID: S066.

[15] A. M. Leshansky, L. M. Pismen, (2009), Breakup of drops in a microfluidic T-junction, Physics of Fluids 21, 023303.

DOI: 10.1063/1.3078515

[16] F. P. Bretherton, (1961), The motion of long bubbles in tubes, J. Fluid Mech, 166, 10.

[17] Brackbill JU, Kothe DB, Zemach C, (1992), A continuum method for modeling surface tension, J. Comp Phys, 100: 335–354.

DOI: 10.1016/0021-9991(92)90240-y

[18] Renardy Y, (2007), The effects of confinement and inertia on the production of droplets, Rheol Acta 46: 521–529.

DOI: 10.1007/s00397-006-0150-y

[19] G. Karniadakis, A. Beskok, N. Aluru, (2004), Microflows and Nanoflows Fundamentals and Simulation, Springer.