| Stochastic transitions and jamming in granular pipe flow. | |
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MedLine Citation:
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PMID: 21517496 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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We study a model granular suspension driven down a channel by an embedding fluid via computer simulations. We characterize the different system flow regimes and the stochastic nature of the transitions between them. For packing fractions below a threshold ϕ_{m}, granular flow is disordered and exhibits an Ostwald-de Waele-type power-law shear-stress constitutive relation. Above ϕ_{m}, two asymptotic states exist; disordered flow can persist indefinitely, yet, in a fraction of samples, the system self-organizes in an ordered form of flow where grains move in parallel ordered layers. In the latter regime, the Ostwald-de Waele relationship breaks down and a nearly solid plug appears in the center, with linear shear regions at the boundaries. Above a higher threshold ϕ_{g}, an abrupt jamming transition is observed if ordering is avoided. |
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Authors:
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Samuel Brand; Robin C Ball; Mario Nicodemi |
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Publication Detail:
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Type: Journal Article Date: 2011-03-30 |
Journal Detail:
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Title: Physical review. E, Statistical, nonlinear, and soft matter physics Volume: 83 ISSN: 1550-2376 ISO Abbreviation: Phys Rev E Stat Nonlin Soft Matter Phys Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-04-26 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101136452 Medline TA: Phys Rev E Stat Nonlin Soft Matter Phys Country: United States |
Other Details:
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Languages: eng Pagination: 031309 Citation Subset: IM |
Affiliation:
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Department of Physics and Complexity Science Centre, University of Warwick, United Kingdom. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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