Title
Effect of geometry on droplet formation in the squeezing regime in a microfluidic T-junction
Abbreviated Journal Title
Microfluid. Nanofluid.
Keywords
Microfluidics; Capillary number; Lattice Boltzmann; Multiphase flow; LATTICE BOLTZMANN SIMULATION; MICROCHANNELS; DYNAMICS; FLUIDS; BREAK; FLOWS; MODEL; Nanoscience & Nanotechnology; Instruments & Instrumentation; Physics, ; Fluids & Plasmas
Abstract
In the surface tension-dominated microchannel T-junction, droplets can be formed as a result of the mixing of two dissimilar, immiscible fluids. This article presents results for very low Capillary numbers and different flow rates of the continuous and dispersed phases. Through three-dimensional lattice Boltzmann-based simulations, the mechanism of the formation of "plugs'' in the squeezing regime has been examined and the size of the droplets quantified. Results for Re(c) < < 1 show the dependence of flow rates of the two fluids on the length of the droplets formed, which is compared with existing experimental data. It is shown that the size of plugs formed decreases as the Capillary number increases in the squeezing regime. This article clearly shows that the geometry effect, i.e., the widths of the two channels and the depth of the assembly, plays an important role in the determination of the length of the plugs, a fact that was ignored in earlier experimental correlations.
Journal Title
Microfluidics and Nanofluidics
Volume
8
Issue/Number
6
Publication Date
1-1-2010
Document Type
Article
Language
English
First Page
799
Last Page
812
WOS Identifier
ISSN
1613-4982
Recommended Citation
"Effect of geometry on droplet formation in the squeezing regime in a microfluidic T-junction" (2010). Faculty Bibliography 2010s. 207.
https://stars.library.ucf.edu/facultybib2010/207
Comments
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