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Homogeneous fluidization of geldart D particles in a gas–solid fluidized bed with a frame impeller / Ying Han in Industrial & engineering chemistry research, Vol. 51 N° 50 (Décembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 50 (Décembre 2012) . - pp 16482–16487 Titre : Homogeneous fluidization of geldart D particles in a gas–solid fluidized bed with a frame impeller Type de document : texte imprimé Auteurs : Ying Han, Auteur ; Jia-Jun Wang, Auteur ; Xue-Ping Gu, Auteur Année de publication : 2013 Article en page(s) : pp 16482–16487 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Particles  Gas  solid Résumé : The influence of agitation of a frame impeller on the fluidization performance of Geldart D particles is experimentally and numerically studied in a gas–solid stirred fluidized bed, using a three-dimensional (3D) unsteady computational fluid dynamics (CFD) simulation. The bed pressure drops obtained from simulations are in reasonable agreement with those measured with pressure transducers, which validates the CFD models. The experimental results of the pressure fluctuation and the simulated ones of the solid volume fraction distribution show that Geldart D particles can perform homogeneous fluidization in the presence of the impeller. The homogeneous fluidization regime expands as the minimum bubbling velocity increases with the agitation speed while the minimum fluidizing velocity remains unaffected. In addition, the uniformity of particle velocities that are distributed in the entire fluidized bed is also improved by the agitation of the frame impeller. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301574q [article] Homogeneous fluidization of geldart D particles in a gas–solid fluidized bed with a frame impeller [texte imprimé] / Ying Han, Auteur ; Jia-Jun Wang, Auteur ; Xue-Ping Gu, Auteur . - 2013 . - pp 16482–16487. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 50 (Décembre 2012) . - pp 16482–16487 Mots-clés : Particles  Gas  solid Résumé : The influence of agitation of a frame impeller on the fluidization performance of Geldart D particles is experimentally and numerically studied in a gas–solid stirred fluidized bed, using a three-dimensional (3D) unsteady computational fluid dynamics (CFD) simulation. The bed pressure drops obtained from simulations are in reasonable agreement with those measured with pressure transducers, which validates the CFD models. The experimental results of the pressure fluctuation and the simulated ones of the solid volume fraction distribution show that Geldart D particles can perform homogeneous fluidization in the presence of the impeller. The homogeneous fluidization regime expands as the minimum bubbling velocity increases with the agitation speed while the minimum fluidizing velocity remains unaffected. In addition, the uniformity of particle velocities that are distributed in the entire fluidized bed is also improved by the agitation of the frame impeller. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301574q