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Double emulsion production in glass capillary microfluidic device: Parametric investigation of droplet generation behaviour

Nabavi, SA, Vladisavljević, GT, Gu, S and Ekanem, EE (2015) Double emulsion production in glass capillary microfluidic device: Parametric investigation of droplet generation behaviour Chemical Engineering Science, 130 (7 July). pp. 183-196.

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Abstract

A three-phase axisymmetric numerical model based on Volume of Fluid–Continuum Surface Force (VOF–CSF) model was developed to perform parametric analysis of compound droplet production in three-phase glass capillary devices that combine co-flow and countercurrent flow focusing. The model predicted successfully generation of core–shell and multi-cored double emulsion droplets in dripping and jetting (narrowing and widening) regime and was used to investigate the effects of phase flow rates, fluid properties, and geometry on the size, morphology, and production rate of droplets. As the outer fluid flow rate increased, the size of compound droplets was reduced until a dripping-to-jetting transition occurred. By increasing the middle fluid flow rate, the size of compound droplets increased, which led to a widening jetting regime. The jetting was supressed by increasing the orifice size in the collection capillary or increasing the interfacial tension at the outer interface up to 0.06 N/m. The experimental and simulation results can be used to encapsulate CO2 solvents within gas-permeable microcapsules.

Item Type: Article
Authors :
AuthorsEmailORCID
Nabavi, SAUNSPECIFIEDUNSPECIFIED
Vladisavljević, GTUNSPECIFIEDUNSPECIFIED
Gu, SUNSPECIFIEDUNSPECIFIED
Ekanem, EEUNSPECIFIEDUNSPECIFIED
Date : 20 March 2015
Funders : UK Engineering and Physical Sciences Research Council (EPSRC), FP7 Marie Curie
Identification Number : https://doi.org/10.1016/j.ces.2015.03.004
Copyright Disclaimer : Copyright © 2016 Elsevier B.V. or its licensors or contributors.
Uncontrolled Keywords : Dripping regime;, Jetting regime, Core–shell droplets, Flow focusing, Solvent encapsulation, Glass capillary microfluidics
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 10:59
Last Modified : 28 Mar 2017 10:59
URI: http://epubs.surrey.ac.uk/id/eprint/810592

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