Fluid dynamics of air in a packed bed: velocity profiles and the continuum model assumption

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dc.contributor.authorNEGRINI, A. L.
dc.contributor.authorFUELBER, A.
dc.contributor.authorFREIRE, J. T.
dc.contributor.authorTHOMÉO, J. C. [UNESP]
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:16:09Z
dc.date.available2014-05-20T15:16:09Z
dc.date.issued1999-12-01
dc.description.abstractAir flow through packed beds was analyzed experimentally under conditions ranging from those that reinforce the effect of the wall on the void fraction to those that minimize it. The packing was spherical particles, with a tube-to-particle diameter ratio (D/dp) between 3 and 60. Air flow rates were maintained between 1.3 and 4.44 m3/min, and gas velocity was measured with a Pitot tube positioned above the bed exit. Measurements were made at various radial and angular coordinate values, allowing the distribution of air flow across the bed to be described in detail. Comparison of the experimentally observed radial profiles with those derived from published equations revealed that at high D/dp ratios the measured and calculated velocity profiles behaved similarly. At low ratios, oscillations in the velocity profiles agreed with those in the voidage profiles, signifying that treating the porous medium as a continuum medium is questionable in these cases.en
dc.description.affiliationUniversidade Federal de São Carlos (UFSCar)
dc.description.affiliationUniversidade Estadual Paulista
dc.description.affiliationUnespUniversidade Estadual Paulista
dc.format.extent421-432
dc.identifierhttp://dx.doi.org/10.1590/S0104-66321999000400010
dc.identifier.citationBrazilian Journal of Chemical Engineering. Brazilian Society of Chemical Engineering, v. 16, n. 4, p. 421-432, 1999.
dc.identifier.doi10.1590/S0104-66321999000400010
dc.identifier.issn0104-6632
dc.identifier.scieloS0104-66321999000400010
dc.identifier.urihttp://hdl.handle.net/11449/29923
dc.language.isoeng
dc.publisherBrazilian Society of Chemical Engineering
dc.relation.ispartofBrazilian Journal of Chemical Engineering
dc.relation.ispartofjcr0.925
dc.relation.ispartofsjr0,395
dc.rights.accessRightsAcesso aberto
dc.sourceSciELO
dc.subjectFluid Mechanicsen
dc.subjectPorous Mediaen
dc.subjectContinuum Modelen
dc.subjectFixed Beden
dc.subjectVelocity Measurementsen
dc.subjectBed Structureen
dc.titleFluid dynamics of air in a packed bed: velocity profiles and the continuum model assumptionen
dc.typeArtigo

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