A novel mechanism for bubble formation in fluidized systems: The effects of granular temperature on the stability in fluidization

dc.creatorCosta, AMS
dc.creatorde Souza-Santos, ML
dc.date2004
dc.dateJUL-SEP
dc.date2014-11-15T08:10:51Z
dc.date2015-11-26T16:10:08Z
dc.date2014-11-15T08:10:51Z
dc.date2015-11-26T16:10:08Z
dc.date.accessioned2018-03-28T22:58:45Z
dc.date.available2018-03-28T22:58:45Z
dc.identifierBrazilian Journal Of Chemical Engineering. Brazilian Soc Chemical Eng, v. 21, n. 3, n. 479, n. 486, 2004.
dc.identifier0104-6632
dc.identifierWOS:000222118200012
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/76546
dc.identifierhttp://www.repositorio.unicamp.br/handle/REPOSIP/76546
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/76546
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1266795
dc.descriptionThis work contains a novel approach for the study of stability in fluidized systems. It includes the influence of solid particle kinetic energy variations, which are known as granular temperature. The stability is verified by the temporal evolution of bed fluid-dynamics properties (solid volumetric fraction, fluid velocity, solid particles velocity) after small perturbations. The bed is stable when the amplitudes of perturbations decrease with time. The work departs from the mass and momentum continuity equations for the solid and fluid phase, as proposed by Anderson and Jackson (1968). Those are complemented by an equation describing the energy balance from the point of view of granular temperature. Then, a linear approximation for the equations after the introduction of small magnitude perturbations is obtained. The application of harmonic solutions allows arriving to the temporal description of the perturbations. Results show the occurrence of instabilities on the direction transverse to gravity. This cannot be observed by previous approaches (Anderson and Jackson, 1968, 1969; Homsy et al., 1980; Liu, 1982). The present work also suggests a new mechanism for the formation of bubbles in fluidized systems. The parametric influence of the model on the stability of fluidized systems is also verified.
dc.description21
dc.description3
dc.description479
dc.description486
dc.languageen
dc.publisherBrazilian Soc Chemical Eng
dc.publisherSao Paulo
dc.publisherBrasil
dc.relationBrazilian Journal Of Chemical Engineering
dc.relationBraz. J. Chem. Eng.
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectfluidized beds
dc.subjectstability
dc.subjectgranular temperature
dc.subjectlinear analysis
dc.subjectKinetic-theory
dc.subjectBeds
dc.subjectFlow
dc.subjectInstabilities
dc.subjectWaves
dc.titleA novel mechanism for bubble formation in fluidized systems: The effects of granular temperature on the stability in fluidization
dc.typeArtículos de revistas


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