Modeling of Droplet Generation by a Modified T-Junction Device Using COMSOL

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Abstract:

This paper presents a numerical study of the formation of droplets in a novel two-dimensional T-junction device by using a commercial CFD package: COMSOL Multiphysics. Numerical simulations were carried out for different flow conditions. Different flow rates lead to four regimes: continuous flow, droplet generation, detached, and stalled. The capillary number of the cross-flow turns out to be the key factors in the droplet generation process. The simulation results are validated by comparison to the existing experimental data.

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112-116

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December 2014

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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[1] K. Song, Design and fabrication of novel microfluidic systems for microsphere generation, Doctor of Philosophy, Biomedical Engineering University of Saskatchewan, Saskaton, (2011).

Google Scholar

[2] M. Mbanjwa, K. Land, L. Jewell, and I. Gledhill, Experimental and numerical studies of emulsion formation in a microfluidic T-junction, presented at the AfriCOMP11: Second African Conference on Computational Mechanics, Cape Town, (2011).

Google Scholar

[3] F. Ilnicki, P. Sobieszuk, and R. Pohorecki, Simulations of a two phase flow in a closed microchannel, Chemical and Process Engineering-Inzynieria Chemiczna I Procesowa, vol. 30, pp.205-216, (2009).

Google Scholar

[4] D. Y. Qian and A. Lawal, Numerical study on gas and liquid slugs for Taylor flow in a T-junction microchannel, Chemical Engineering Science, vol. 61, pp.7609-7625, Dec (2006).

DOI: 10.1016/j.ces.2006.08.073

Google Scholar

[5] S. Bashir, J. M. Rees, and W. B. Zimmerman, Simulations of microfluidic droplet formation using the two-phase level set method, Chemical Engineering Science, vol. 66, pp.4733-4741, Oct (2011).

DOI: 10.1016/j.ces.2011.06.034

Google Scholar

[6] S. Arias, D. Legendre, and R. Gonzalez-Cinca, Numerical simulation of bubble generation in a T-junction, Computers & Fluids, vol. 56, pp.49-60, Mar (2012).

DOI: 10.1016/j.compfluid.2011.11.013

Google Scholar

[7] Y. Liu and W. Z. Li, Numerical simulation on two-phase bubbly flow split in a branching T-junction, International Journal of Air-Conditioning and Refrigeration (IJACR), vol. 19, pp.253-262, (2011).

DOI: 10.1142/s2010132511000612

Google Scholar

[8] S. Osher and J. A. Sethian, Fronts propagating with curvature-dependent speed: Algorithms based on Hamilton-Jacobi formulations, Journal of Computational Physics, vol. 79, pp.12-49, (1988).

DOI: 10.1016/0021-9991(88)90002-2

Google Scholar