Mostrar el registro sencillo del ítem

Shock waves induced by a planar obstacle in a vibrated granular gas

hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorVILQUIN, Alexandre
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorKELLAY, Hamid
hal.structure.identifierLaboratoire Ondes et Matière d'Aquitaine [LOMA]
dc.contributor.authorBOUDET, Jean-François
dc.date.issued2018-05-10
dc.identifier.issn0022-1120
dc.description.abstractEnThe low value of the speed of sound in dilute granular media permits the study of the properties of supersonic flows for a wide range of Mach numbers. In this paper, we report the experimental observation of a subsonic–supersonic transition in a vibrated granular gas. The shock fronts studied are obtained by simply pushing a rectangular obstacle into the granular gas for different obstacle velocities. The supersonic regime is characterized by the formation of normal shock waves whose width increases when the Mach number decreases to values close to 1. The bimodal model proposed by Mott-Smith in the 1950s provides a good description for the velocity distributions as well as the macroscopic quantities for shock waves in molecular gases but remains inadequate for dissipative media like granular gases and plasmas. Here by examining the shock front structure for a wide range of Mach numbers, we adapt the Mott-Smith bimodal description to a dissipative medium. By using balance equations from granular kinetic theory and taking into account different dissipation sources, the proposed model allows us to understand how this dissipation modifies temperature, mean velocity and volume fraction profiles through the shock front.
dc.language.isoen
dc.publisherCambridge University Press (CUP)
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/
dc.subject.engranular media
dc.subject.enkinetic theory
dc.subject.enshock waves
dc.title.enShock waves induced by a planar obstacle in a vibrated granular gas
dc.typeArticle de revue
dc.identifier.doi10.1017/jfm.2018.128
dc.subject.halPhysique [physics]/Mécanique [physics]/Mécanique des fluides [physics.class-ph]
bordeaux.journalJournal of Fluid Mechanics
bordeaux.page163 - 187
bordeaux.volume842
bordeaux.peerReviewedoui
hal.identifierhal-01737201
hal.version1
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01737201v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Fluid%20Mechanics&rft.date=2018-05-10&rft.volume=842&rft.spage=163%20-%20187&rft.epage=163%20-%20187&rft.eissn=0022-1120&rft.issn=0022-1120&rft.au=VILQUIN,%20Alexandre&KELLAY,%20Hamid&BOUDET,%20Jean-Fran%C3%A7ois&rft.genre=article


Archivos en el ítem

ArchivosTamañoFormatoVer

No hay archivos asociados a este ítem.

Este ítem aparece en la(s) siguiente(s) colección(ones)

Mostrar el registro sencillo del ítem