Predicting the size of droplets produced through Laplace pressure induced snap-off

Laplace pressure driven snap-off is a technique that is used to produce droplets for emulsions and microfluidics purposes. Previous predictions of droplet size have assumed a quasi-equilibrium low flow limit. We present a simple model to predict droplet sizes over a wide range of flow rates, demonst...

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Bibliographic Details
Published in:Soft matter 2016-09, Vol.12 (35), p.7398-744
Main Authors: Barkley, Solomon, Scarfe, Samantha J, Weeks, Eric R, Dalnoki-Veress, Kari
Format: Article
Language:English
Subjects:
Droplets
Emulsions
Flow rate
Landscapes
Mathematical models
Microfluidics
Phases
Viscosity
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Summary:Laplace pressure driven snap-off is a technique that is used to produce droplets for emulsions and microfluidics purposes. Previous predictions of droplet size have assumed a quasi-equilibrium low flow limit. We present a simple model to predict droplet sizes over a wide range of flow rates, demonstrating a rich landscape of droplet stability depending on droplet size and growth rate. The model accounts for the easily adjusted experimental parameters of geometry, interfacial tension, and the viscosities of both phases. Laplace pressure driven snap-off is used to produce droplets for emulsions and microfluidics. A simple model predicts droplet sizes over a wide range of flow rates, demonstrating a rich landscape of droplet stability depending on droplet size and growth rate.
ISSN:1744-683X
1744-6848
DOI:10.1039/c6sm00853d