Issue 18, 2014

Flow and jamming of granular suspensions in foams

Abstract

The drainage of particulate foams is studied under conditions where the particles are not trapped individually by constrictions of the interstitial pore space. The drainage velocity decreases continuously as the particle volume fraction φp increases. The suspensions jam – and therefore drainage stops – for values φ*p which reveal a strong effect of the particle size. In accounting for the particular geometry of the foam, we show that φ*p accounts for unusual confinement effects when the particles pack into the foam network. We model quantitatively the overall behavior of the suspension – from flow to jamming – by taking into account explicitly the divergence of its effective viscosity at φ*p. Beyond the scope of drainage, the reported jamming transition is expected to have a deep significance for all aspects related to particulate foams, from aging to mechanical properties.

Graphical abstract: Flow and jamming of granular suspensions in foams

Article information

Article type
Paper
Submitted
09 Jan 2014
Accepted
04 Feb 2014
First published
04 Feb 2014

Soft Matter, 2014,10, 3277-3283

Flow and jamming of granular suspensions in foams

B. Haffner, Y. Khidas and O. Pitois, Soft Matter, 2014, 10, 3277 DOI: 10.1039/C4SM00049H

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