Drop Formation in Non-Newtonian Fluids

Mounir Aytouna, Jose Paredes, Noushine Shahidzadeh-Bonn, Sébastien Moulinet, Christian Wagner, Yacine Amarouchene, Jens Eggers, and Daniel Bonn
Phys. Rev. Lett. 110, 034501 – Published 14 January 2013

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.

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  • Received 19 June 2012

DOI:https://doi.org/10.1103/PhysRevLett.110.034501

© 2013 American Physical Society

Authors & Affiliations

Mounir Aytouna1, Jose Paredes1, Noushine Shahidzadeh-Bonn1, Sébastien Moulinet2, Christian Wagner3, Yacine Amarouchene4, Jens Eggers5, and Daniel Bonn1,2

  • 1Soft Matter Group, Van der Waals-Zeeman Institute, IoP, Science Park 904, Amsterdam, Netherlands
  • 2Laboratoire de Physique Statistique, ENS, 24 rue Lhomond, 75005 Paris, France
  • 3Experimentalphysik, Universität des Saarlandes, Postfach 151150, 66041 Saarbrücken, Germany
  • 4LOMA, Université Bordeaux 1, 351 cours de la Libération, 33405 Talence, France
  • 5Department of Mathematics, University of Bristol, University Walk, Bristol BS8 1TW, United Kingdom

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Vol. 110, Iss. 3 — 18 January 2013

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