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Incompressible-compressible transition in falling granular jets

hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorPRADO, , Gaël
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorAMAROUCHENE, Yacine
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorKELLAY, Hamid
dc.date.created2013-02-20
dc.date.issued2013
dc.identifier.issn0295-5075
dc.description.abstractEnThrough a systematic experimental investigation of the behavior of falling granular jets under the action of gravity for different particle sizes, funnel diameters and ambient air pressures, necessary conditions to obtain incompressible granular jets are identified. A transition from compressible (characterized by a significant density decrease along the propagation) to incompressible granular jets (characterized by a constant density) is observed. This transition depends solely on the aspect ratio between the diameter of the particles and the diameter of the funnel. Surprisingly, the incompressible liquid-like behavior observed here seems to find its origin in the balance between the heat flux and the dissipation in the funnel independently of the ambient fluid pressure. A simple granular hydrodynamic model provides a good description of the transition.
dc.language.isoen
dc.publisherEuropean Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing
dc.rights.urihttp://creativecommons.org/licenses/by-sa/
dc.titleIncompressible-compressible transition in falling granular jets
dc.typeArticle de revue
dc.identifier.doi10.1209/0295-5075/102/24006
dc.subject.halPhysique [physics]/Matière Condensée [cond-mat]/Matière Molle [cond-mat.soft]
bordeaux.journalEPL - Europhysics Letters
bordeaux.page2406
bordeaux.volume102
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-00844434
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-00844434v1
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