| Granular flow through an aperture: Pressure and flow rate are independent. | |
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MedLine Citation:
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PMID: 21797356 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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We simultaneously measure the flow rate and the normal force on the base, near the outlet, during the discharge through an orifice of a dense packing of monosized disks driven by a conveyor belt. We find that the normal force on the base decreases even when a constant flow rate is measured. In addition, we show, by changing the mass of the disks, that pressure can be changed while the flow rate remains constant. Conversely, we are able, by changing the belt velocity, to set different flow rates for the same pressure. The experiment confirms that, contrary to what has been implicitly assumed in numerous works, the flow rate through an aperture is not controlled by the pressure in the outlet region. |
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Authors:
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María Alejandra Aguirre; Juan Gabriel Grande; Adriana Calvo; Luis A Pugnaloni; Jean-Christophe Géminard |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-6-30 |
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 Jun |
Date Detail:
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Created Date: 2011-7-29 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: 061305 Citation Subset: - |
Affiliation:
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Grupo de Medios Porosos, Fac. de Ingeniería, Universidad de Buenos Aires, Paseo Colón 850, (C1063ACV) Buenos Aires, Argentina and LIA PMF-FMF (Franco-Argentinian International Associated Laboratory in the Physics and Mechanics of Fluids), Argentina - France. |
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