Effect of confinement on droplet breakup in sheared emulsions

Langmuir : the ACS Journal of Surfaces and Colloids
Anja VananroyePaula Moldenaers

Abstract

The breakup of Newtonian droplets in a Newtonian matrix during shear flow is investigated in a counterrotating parallel plate device. For bulk conditions, the critical capillary number for breakup is known to be only determined by the viscosity ratio. Here, we show that the critical capillary number is also affected by the degree of confinement: for low viscosity ratios, confinement suppresses breakup, whereas for high viscosity ratios, confinement promotes breakup. This way, above a critical value for the degree of confinement, even droplets with a viscosity ratio larger than 4, which are unbreakable by shear in a bulk situation, can be broken in a simple shear flow field.

References

Dec 31, 2002·Journal of Colloid and Interface Science·Jai A PathakKalman B Migler

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Citations

Apr 5, 2011·The Review of Scientific Instruments·Seung Jae BaikChristian Clasen
Oct 12, 2012·Lab on a Chip·Aiping FangJoëlle Davy
Jan 23, 2016·Colloids and Surfaces. B, Biointerfaces·Roberta LiuzziSergio Caserta
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Aug 31, 2013·Journal of Colloid and Interface Science·Pieter De BruynPaula Moldenaers
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Oct 15, 2014·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Yongping Chen, Chengyao Wang
Oct 3, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Dongju ChenPaula Moldenaers
Dec 30, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Mario MinaleStefano Guido
Sep 21, 2017·Langmuir : the ACS Journal of Surfaces and Colloids·Chaoying MaoGuangxian Li

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