Viscosity of particulate soap films: approaching the jamming of 2D capillary suspensions. Issue 18 (25th April 2017)

• Record Type: Journal Article
• Authors: Timounay, Yousra; Rouyer, Florence
• Is Part Of: Soft matter. Volume 13:Issue 18(2017)
• Page Start: 3449
• Page End: 3456
• Publication Date: 2017-04-25
• Subjects: Soft condensed matter -- Periodicals; 530.413
• DOI: 10.1039/c7sm00090a
• Languages: English
• ISSNs: 1744-683X

Abstract

Abstract : PIV measurements during the retraction of 2D particulate soap films reveal their viscous property. 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.