dc.creatorAlvarez
dc.creatorCarlos A.; Franklin
dc.creatorErick de Moraes
dc.date2017
dc.datejan
dc.date2017-11-13T13:57:24Z
dc.date2017-11-13T13:57:24Z
dc.date.accessioned2018-03-29T06:10:44Z
dc.date.available2018-03-29T06:10:44Z
dc.identifierPhysica A: Statistical Mechanics And Its Applications. Elsevier Science Bv, v. 465, p. 725 - 741, 2017.
dc.identifier0378-4371
dc.identifier1873-2119
dc.identifierWOS:000386411700070
dc.identifier10.1016/j.physa.2016.08.071
dc.identifierhttp://www.sciencedirect.com/science/article/pii/S0378437116305982
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/330014
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1367039
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionGrain flows through pipes are frequently found in various settings, such as in pharmaceutical, chemical, petroleum, mining and food industries. In the case of size-constrained gravitational flows, density waves consisting of alternating high-and low-compactness regions may appear. This study investigates experimentally the dynamics of density waves that appear in gravitational flows of fine grains through vertical and slightly inclined pipes. The experimental device consisted of a transparent glass pipe through which different populations of glass spheres flowed driven by gravity. Our experiments were performed under controlled ambient temperature and relative humidity, and the granular flow was filmed with a high-speed camera. Experimental results concerning the length scales and celerities of density waves are presented, together with a one-dimensional model and a linear stability analysis. The analysis exhibits the presence of a long-wavelength instability, with the most unstable mode and a cut-off wavenumber whose values are in agreement with the experimental results. (C) 2016 Elsevier B.V. All rights reserved.
dc.description465
dc.description725
dc.description741
dc.descriptionEcuadorian government foundation SENESCYT [2013-AR2Q2850]
dc.descriptionFAPESP [2012/19562-6]
dc.descriptionCNPq [471391/2013-1]
dc.descriptionFAEPEX/UNICAMP [AP0008/2013, 519.292]
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageEnglish
dc.publisherElsevier Science BV
dc.publisherAmsterdam
dc.relationPhysica A: Statistical Mechanics and its Applications
dc.rightsfechado
dc.sourceWOS
dc.subjectFine Grains
dc.subjectGravitational Flow
dc.subjectNarrow Pipes
dc.subjectInstability
dc.subjectDensity Waves
dc.titleIntermittent Gravity-driven Flow Of Grains Through Narrow Pipes
dc.typeArtículos de revistas


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