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

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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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Publication details

The article was received on 14 Jan 2017, accepted on 18 Apr 2017 and first published on 18 Apr 2017


Article type: Paper
DOI: 10.1039/C7SM00090A
Citation: Soft Matter, 2017, Advance Article
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    Viscosity of particulate soap films: approaching the jamming of 2D capillary suspensions

    Y. Timounay and F. Rouyer, Soft Matter, 2017, Advance Article , DOI: 10.1039/C7SM00090A

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