Drop formation in non-newtonian fluids

Mounir Aytouna*, Jose Paredes, Noushine Shahidzadeh-Bonn, Sébastien Moulinet, Christian Wagner, Yacine Amarouchene, Jens Eggers, Daniel Bonn

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

40 Citations (Scopus)

Abstract

We study the pinch-off dynamics of droplets of yield stress and shear thinning fluids. To separate the two non-Newtonian effects, we use a yield stress material for which the yield stress can be tuned without changing the shear thinning behavior, and a shear thinning system (without a yield stress) for which the shear thinning can be controlled over a large range, without introducing too much elasticity into the system. We find that the pinch-off remains very similar to that of constant viscosity Newtonian liquids, and consequently thinning in shear flow does not imply a thinning in elongational flow.

Original languageEnglish
Article number034501
JournalPhysical Review Letters
Volume110
Issue number3
DOIs
Publication statusPublished - 14 Jan 2013

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