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Title: Double emulsion production in glass capillary microfluidic device: Parametric investigation of droplet generation behaviour
Authors: Nabavi, Seyed Ali
Vladisavljevic, Goran T.
Gu, Sai
Ekanem, Ekanem E.
Keywords: Dripping regime
Jetting regime
Core-shell droplets
Solvent encapsulation
Flow focusing
Glass capillary microfluidics
Issue Date: 2015
Publisher: Elsevier (© the authors)
Citation: NABAVI, S.A. .. et al., 2015. Double emulsion production in glass capillary microfluidic device: Parametric investigation of droplet generation behaviour. Chemical Engineering Science, 130, pp.183-196.
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.
Description: This is an Open Access Article. It is published by Elsevier under the Creative Commons Attribution 4.0 Unported Licence (CC BY). Full details of this licence are available at : http://creativecommons.org/licenses/by/4.0/
Sponsor: This work was supported by the Engineering and Physical Sciences Research Council (EPSRC)[grant number P/J020184/1]; and FP7 Marie Curie [grant number 312261].
Version: Published version
DOI: 10.1016/j.ces.2015.03.004
URI: https://dspace.lboro.ac.uk/2134/17091
Publisher Link: http://dx.doi.org/10.1016/j.ces.2015.03.004
ISSN: 0009-2509
Appears in Collections:Published Articles (Chemical Engineering)

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