Hypothesis: Predicting formation mode of double emulsion drops in microfluidic emulsification is crucial for controlling the drop size and morphology.
Experiments And Modelling: A three-phase Volume of Fluid-Continuum Surface Force (VOF-CSF) model was developed, validated with analytical solutions, and used to investigate drop formation in different regimes. Experimental investigations were done using a glue-free demountable glass capillary device with a true axisymmetric geometry, capable of readjusting the distance between the two inner capillaries during operation.
Findings: A non-dimensional parameter (ζ) for prediction of double emulsion formation mode as a function of the capillary numbers of all fluids and device geometry was developed and its critical values were determined using simulation and experimental data. At logζ>5.7, drops were formed in dripping mode; the widening jetting occurred at 5
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http://dx.doi.org/10.1016/j.jcis.2017.05.115 DOI Listing Publication Analysis
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