| Hysteresis in a hydrodynamic model of dense granular flows. | |
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MedLine Citation:
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PMID: 21728522 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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A hydrodynamic model for dense granular flows, previously developed for confined flows, has been extended to address free surface flow down an inclined chute. Results show that the model can predict the existence of two critical inclination angles, namely, the avalanche starting angle θ_{start} above which the granular bed begins flowing from an initially jammed configuration, and an avalanche stopping angle θ_{stop}, which is the minimum to maintain flowing conditions, in agreement with experiments and numerical simulations available from the literature. The dependence of these critical angles on the bed depth is also analytically formulated, reflecting the expected qualitative behavior. Such a hysteretic behavior is specific of granular flow and its prediction provides indications of consistence of the modeling approach. The improved model also captures the scaling of the velocity profiles down the bed depth. |
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Authors:
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Riccardo Artoni; Andrea Santomaso; Paolo Canu |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-5-18 |
Journal Detail:
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Title: Physical review. E, Statistical, nonlinear, and soft matter physics Volume: 83 ISSN: 1550-2376 ISO Abbreviation: - Publication Date: 2011 May |
Date Detail:
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Created Date: 2011-7-6 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: - |
Other Details:
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Languages: ENG Pagination: 051304 Citation Subset: - |
Affiliation:
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Dipartimento di Principi e Impianti di Ingegneria Chimica "I. Sorgato,"Università di Padova, Via Marzolo 9, IT-35100 Padova, Italy. |
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