Issue 18, 2017
From the journal:

Soft Matter

Viscosity of particulate soap films: approaching the jamming of 2D capillary suspensions

Yousra Timounay ORCID logo *a  and  Florence Rouyer ORCID logo b  

* Corresponding authors

a Université Paris-Est, Laboratoire Navier, UMR 8205 CNRS, ENPC ParisTech, IFSTTAR, 2 allée Kepler, 77 420 Champs-Sur-Marne, France
E-mail: ytimouna@syr.edu

b Université Paris-Est, Laboratoire Navier, UMR 8205 CNRS, ENPC ParisTech, IFSTTAR, 5 bd Descartes, 77 454 Marne-la-Vallée, France
E-mail: florence.rouyer@u-pem.fr

Abstract

We compute the effective viscosity of particulate soap films thanks to local velocity fields obtained by Particle Image Velocimetry (PIV) during film retraction experiments. We identify the jamming of these 2D capillary suspensions at a critical particle surface fraction (≃0.84) where effective viscosity diverges. Pair correlation function and number of neighbors in contact or close to contact reveal the cohesive nature of this 2D capillary granular media. The experimental 2D dynamic viscosities can be predicted by a model considering viscous dissipation at the liquid interfaces induced by the motion of individual particles.

Graphical abstract: Viscosity of particulate soap films: approaching the jamming of 2D capillary suspensions

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Article information

DOI
https://doi.org/10.1039/C7SM00090A
Article type
Paper
Submitted
14 Jan 2017
Accepted
18 Apr 2017
First published
18 Apr 2017

Soft Matter, 2017,13, 3449-3456

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Viscosity of particulate soap films: approaching the jamming of 2D capillary suspensions

Y. Timounay and F. Rouyer, Soft Matter, 2017, 13, 3449 DOI: 10.1039/C7SM00090A

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