Preprint Article Version 1 This version is not peer-reviewed

Encapsulation of Droplets Using Cusp Formation Behind a Drop Rising in a Non-Newtonian Fluid

Version 1 : Received: 29 May 2018 / Approved: 30 May 2018 / Online: 30 May 2018 (09:08:41 CEST)

A peer-reviewed article of this Preprint also exists.

Poryles, R.; Zenit, R. Encapsulation of Droplets Using Cusp Formation behind a Drop Rising in a Non-Newtonian Fluid. Fluids 2018, 3, 54. Poryles, R.; Zenit, R. Encapsulation of Droplets Using Cusp Formation behind a Drop Rising in a Non-Newtonian Fluid. Fluids 2018, 3, 54.

Journal reference: Fluids 2018, 3, 54
DOI: 10.3390/fluids3030054

Abstract

The rising of an oil drop in a non-Newtonian viscous solution is studied experimentally. In this case, the shape of the ascending drop is strongly affected by the non-Newtonian properties of the surrounding liquid. We found that the so-called velocity discontinuity phenomena is observed for drops larger than a certain critical size. Beyond the critical velocity, the formation of a long tail is observed, from which small droplets are continuously emitted. We determined that the fragmentation of the tail results mainly from the effect of capillary effects. We explore the idea of using this configuration as a new encapsulation technique, where the size and frequency of droplets can be well predicted.

Subject Areas

drop; cusp instability; encapsulation

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