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Does gravity cause load-bearing bridges in colloidal and granular systems?

Jenkins, M. C. and Haw, M. D. and Barker, G. C. and Poon, W. C. K. and Egelhaaf, S. U. (2011) Does gravity cause load-bearing bridges in colloidal and granular systems? Physical Review Letters, 107 (3). -. ISSN 0031-9007

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    We study structures which can bear loads, "bridges", in particulate packings. To investigate the relationship between bridges and gravity, we experimentally determine bridge statistics in colloidal packings. We vary the effective magnitude and direction of gravity, volume fraction, and interactions, and find that the bridge size distributions depend only on the mean number of neighbors. We identify a universal distribution, in agreement with simulation results for granulars, suggesting that applied loads merely exploit preexisting bridges, which are inherent in dense packings.

    Item type: Article
    ID code: 34062
    Keywords: hard sphere, comptuer simulation, crystal nucleation, crystallisation, suspensions, microscopy, particles, packing, matter, Chemical engineering, Physics and Astronomy(all)
    Subjects: Technology > Chemical engineering
    Department: Faculty of Engineering > Chemical and Process Engineering
    Technology and Innovation Centre > Continuous Manufacturing and Crystallisation (CMAC)
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      Depositing user: Pure Administrator
      Date Deposited: 19 Oct 2011 11:58
      Last modified: 28 Mar 2014 11:09

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