| Shear banding and flow-concentration coupling in colloidal glasses. | |
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MedLine Citation:
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PMID: 21231717 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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We report experiments on hard-sphere colloidal glasses that show a type of shear banding hitherto unobserved in soft glasses. We present a scenario that relates this to an instability due to shear-concentration coupling, a mechanism previously thought unimportant in these materials. Below a characteristic shear rate γ(c) we observe increasingly nonlinear and localized velocity profiles. We attribute this to very slight concentration gradients in the unstable flow regime. A simple model accounts for both the observed increase of γ(c) with concentration, and the fluctuations in the flow. |
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Authors:
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R Besseling; L Isa; P Ballesta; G Petekidis; M E Cates; W C K Poon |
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Publication Detail:
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Type: Journal Article Date: 2010-12-20 |
Journal Detail:
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Title: Physical review letters Volume: 105 ISSN: 1079-7114 ISO Abbreviation: Phys. Rev. Lett. Publication Date: 2010 Dec |
Date Detail:
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Created Date: 2011-01-14 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401141 Medline TA: Phys Rev Lett Country: United States |
Other Details:
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Languages: eng Pagination: 268301 Citation Subset: - |
Affiliation:
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SUPA, School of Physics & Astronomy, The University of Edinburgh, Edinburgh, United Kingdom. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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