Dynamics of double emulsion break-up in three phase glass capillary microfluidic devices

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dc.contributor.authorNabavi, Seyed Ali
dc.contributor.authorGu, Sai
dc.contributor.authorVladisavljević, G. T.
dc.contributor.authorEkanem, E. E.
dc.date.accessioned2016-05-03T13:32:46Z
dc.date.available2016-05-03T13:32:46Z
dc.date.issued2015-03-13
dc.description.abstractPinch-off of a compound jet in 3D glass capillary microfluidic device, which combines co-flowing and countercurrent flow focusing geometries, was investigated using an incompressible three-phase axisymmetric Volume of Fluid–Continuum Surface Force (VOF–CSF) numerical model. The model showed good agreement with the experimental drop generation and was capable of predicting formation of core/shell droplets in dripping, narrowing jetting and widening jetting regimes. In dripping and widening jetting regimes, the presence of a vortex flow around the upstream end of the necking thread facilitates the jet break-up. No vortex flow was observed in narrowing jetting regime and pinch-off occurred due to higher velocity at the downstream end of the coaxial thread compared to that at the upstream end. In all regimes, the inner jet ruptured before the outer jet, preventing a leakage of the inner drop into the outer fluid. The necking region moves at the maximum speed in the narrowing jetting regime, due to the highest level of shear at the outer surface of the thread. However, in widening jetting regime, the neck travels the longest distance downstream before it breaks.en_UK
dc.identifier.citationNabavi SA, Gu S, Vladisavljević GT, Ekanem EE. (2015) Dynamics of double emulsion break-up in three phase glass capillary microfluidic devices. Journal of Colloid and Interface Science, Volume 450, July 2015, pp. 279-287en_UK
dc.identifier.issn0021-9797
dc.identifier.urihttp://dx.doi.org/10.1016/j.jcis.2015.03.032
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/9852
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectDrop microfluidicsen_UK
dc.subjectDripping regimeen_UK
dc.subjectNarrowing jettingen_UK
dc.subjectWidening jettingen_UK
dc.subjectCore-shell dropletsen_UK
dc.subjectFlow focusingen_UK
dc.subjectVortex flowen_UK
dc.subjectPinch-off mechanismen_UK
dc.subjectVOF–CSF modelen_UK
dc.subjectGlass capillary deviceen_UK
dc.titleDynamics of double emulsion break-up in three phase glass capillary microfluidic devicesen_UK
dc.typeArticleen_UK

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