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

Jung-Ren Huang, Thomas G. Mason

Research output: Contribution to journalArticle

9 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)2208-2214
Number of pages7
JournalSoft Matter
Volume5
Issue number11
DOIs
Publication statusPublished - 2009 Jul 14

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ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

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