Documents disponibles écrits par cet auteur

Disturbances in the hydrodynamic behavior of a spouted bed caused by an optical fiber probe / Dyrney A. Santos in Industrial & engineering chemistry research, Vol. 51 N° 9 (Mars 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 9 (Mars 2012) . - pp. 3801-3810 Titre : Disturbances in the hydrodynamic behavior of a spouted bed caused by an optical fiber probe : Experimental and CFD study Type de document : texte imprimé Auteurs : Dyrney A. Santos, Auteur ; Gustavo C. Alves, Auteur ; Claudio R. Duarte, Auteur Année de publication : 2012 Article en page(s) : pp. 3801-3810 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Computational  fluid  dynamics  Fiber  optic  sensors  Fluidization  Spouted  bed  Hydrodynamics Résumé : In this work the disturbances in the hydrodynamic behavior caused by the use of an optical fiber probe in a conical-cylindrical spouted bed have been analyzed based on experimental results and CFD simulations using an Eulerian-Eulerian multiphase model. The insertion of the probe inside the spouted bed caused a decrease in the fountain height and in the particle velocity for the spout region. The CFD simulations using the Representative Unit Cell model (RUC) drag model and considering the presence of the probe predicted better the experimental data of the particle velocity distribution than the other simulations performed in this work with other drag models. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25595810 [article] Disturbances in the hydrodynamic behavior of a spouted bed caused by an optical fiber probe : Experimental and CFD study [texte imprimé] / Dyrney A. Santos, Auteur ; Gustavo C. Alves, Auteur ; Claudio R. Duarte, Auteur . - 2012 . - pp. 3801-3810. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 9 (Mars 2012) . - pp. 3801-3810 Mots-clés : Computational  fluid  dynamics  Fiber  optic  sensors  Fluidization  Spouted  bed  Hydrodynamics Résumé : In this work the disturbances in the hydrodynamic behavior caused by the use of an optical fiber probe in a conical-cylindrical spouted bed have been analyzed based on experimental results and CFD simulations using an Eulerian-Eulerian multiphase model. The insertion of the probe inside the spouted bed caused a decrease in the fountain height and in the particle velocity for the spout region. The CFD simulations using the Representative Unit Cell model (RUC) drag model and considering the presence of the probe predicted better the experimental data of the particle velocity distribution than the other simulations performed in this work with other drag models. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25595810

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