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Innovative method using magnetic particle tracking to measure solids circulation in a spouted fluidized bed / Emily E. Patterson 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) Titre : Innovative method using magnetic particle tracking to measure solids circulation in a spouted fluidized bed Type de document : texte imprimé Auteurs : Emily E. Patterson, Auteur ; Jack Halow, Auteur Année de publication : 2010 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Magnetic  Particle  Fluidized  Bed Résumé : We describe an innovative method for measuring particle motion inside spouted fluidized beds. The method uses a magnetic tracer particle, which follows the bulk particle flow and is continuously tracked by multiple magnetic field detectors located outside the bed. We analyze signals from the detectors to determine the tracer position at each instant in time. From statistical analysis of the tracer trajectory, characteristic measures of the bulk particle flow, such as the average recirculation frequency, can be determined as a function of operating conditions. For experiments with a range of particle sizes and densities in a 3.9-cm-diameter spouted bed, we find that average solids recirculation rates correlate with excess velocity (superficial minus minimum spouting velocity), particle density, and bed depth. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9008698 [article] Innovative method using magnetic particle tracking to measure solids circulation in a spouted fluidized bed [texte imprimé] / Emily E. Patterson, Auteur ; Jack Halow, Auteur . - 2010. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 11 (Juin 2010) Mots-clés : Magnetic  Particle  Fluidized  Bed Résumé : We describe an innovative method for measuring particle motion inside spouted fluidized beds. The method uses a magnetic tracer particle, which follows the bulk particle flow and is continuously tracked by multiple magnetic field detectors located outside the bed. We analyze signals from the detectors to determine the tracer position at each instant in time. From statistical analysis of the tracer trajectory, characteristic measures of the bulk particle flow, such as the average recirculation frequency, can be determined as a function of operating conditions. For experiments with a range of particle sizes and densities in a 3.9-cm-diameter spouted bed, we find that average solids recirculation rates correlate with excess velocity (superficial minus minimum spouting velocity), particle density, and bed depth. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9008698