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Experimental and computational fluid dynamics study of dense - phase, transition region, and dilute - phase spouting / Marcos A. S. Barrozo in Industrial & engineering chemistry research, Vol. 49 N° 11 (Juin 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 11 (Juin 2010) . - pp. 5102–5109 Titre : Experimental and computational fluid dynamics study of dense - phase, transition region, and dilute - phase spouting Type de document : texte imprimé Auteurs : Marcos A. S. Barrozo, Auteur ; Claudio R. Duarte, Auteur ; Norman Epstein, Auteur Année de publication : 2010 Article en page(s) : pp. 5102–5109 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Fluid  dynamics Résumé : In this work, the transition between conventional dense-phase spouting and dilute-phase spouting is quantified and characterized on the basis of experimental particle velocity and bed voidage data, obtained with an optical fiber probe, as well as from the evolution of pressure with air velocity. The high gas velocities associated with the dilute-phase spouted bed (DSB) flow regime result in voidages exceeding 0.9 over the entire bed, with no discernible distinction between spout and annulus. The downward particle velocities for the DSB regime differ in magnitude from those in the dense-phase spouting regime. Computational fluid dynamics simulations using the Eulerian granular multiphase model show good agreement with experimental data for the three reproducible flow regimes: dense-phase spouting, transition regime, and dilute-phase spouting. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9004892 [article] Experimental and computational fluid dynamics study of dense - phase, transition region, and dilute - phase spouting [texte imprimé] / Marcos A. S. Barrozo, Auteur ; Claudio R. Duarte, Auteur ; Norman Epstein, Auteur . - 2010 . - pp. 5102–5109. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 11 (Juin 2010) . - pp. 5102–5109 Mots-clés : Fluid  dynamics Résumé : In this work, the transition between conventional dense-phase spouting and dilute-phase spouting is quantified and characterized on the basis of experimental particle velocity and bed voidage data, obtained with an optical fiber probe, as well as from the evolution of pressure with air velocity. The high gas velocities associated with the dilute-phase spouted bed (DSB) flow regime result in voidages exceeding 0.9 over the entire bed, with no discernible distinction between spout and annulus. The downward particle velocities for the DSB regime differ in magnitude from those in the dense-phase spouting regime. Computational fluid dynamics simulations using the Eulerian granular multiphase model show good agreement with experimental data for the three reproducible flow regimes: dense-phase spouting, transition regime, and dilute-phase spouting. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9004892