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Issue 11, 2009
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Deformation, restructuring, and un-jamming of concentrated droplets in large-amplitude oscillatory shear flows

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Abstract

We employ large-amplitude shear oscillation light scattering (SOLS) to study average droplet deformation and positional restructuring in concentrated uniform oil-in-water emulsions. Three dimensionless scattering intensity anisotropy factors, defined using the primary and secondary Bragg peaks, which can result from partial shear-induced ordering, reflect the phase-dependent droplet deformation and tilting. These factors distinguish the soft force-chain buckling regime, where shear disorders the droplets, from the sliding hexagonally-close-packed layer regime, where shear induces positional order. Near and above the jamming limit of spherical particles, the shear-induced structures depend sensitively on the droplet volume fraction and the shear history.

Graphical abstract: Deformation, restructuring, and un-jamming of concentrated droplets in large-amplitude oscillatory shear flows

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Publication details

The article was received on 16 Dec 2008, accepted on 17 Mar 2009 and first published on 22 Apr 2009


Article type: Paper
DOI: 10.1039/B822594J
Citation: Soft Matter, 2009,5, 2208-2214
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    Deformation, restructuring, and un-jamming of concentrated droplets in large-amplitude oscillatory shear flows

    J. Huang and T. G. Mason, Soft Matter, 2009, 5, 2208
    DOI: 10.1039/B822594J

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