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Transient granular flows in an inclined rotating cylinder / David M. Scott in Industrial & engineering chemistry research, Vol. 48 N°1 (Janvier 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°1 (Janvier 2009) . - p. 159-165 Titre : Transient granular flows in an inclined rotating cylinder : filling and emptying Type de document : texte imprimé Auteurs : David M. Scott, Editeur scientifique ; John F. Davidson, Editeur scientifique ; Sim Ee Cheah, Editeur scientifique Année de publication : 2009 Article en page(s) : p. 159-165 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Transient  Granular  Flows  granular  materials  Sand  Poppy  seeds  Glass  beads Résumé : This paper reports the results of an experimental and theoretical study into transient granular flows in an inclined, slowly rotating cylinder. The granular materials used were sand, poppy seeds, and glass beads. The following situations have been studied: (i) feeding an initially empty cylinder, (ii) emptying a cylinder which is initially in steady state with equal feed and discharge flow rates, and (iii) the motion of a localized pile of granular material through the cylinder. Axial profiles of bed depth and discharge flow rates have been measured. The mechanistic model used here has previously been used to describe the transient response to large step changes in feed rate, rotation speed and angle of inclination; it has no free parameters. There is good agreement between theory and experiment for sand and poppy seeds, but there are discrepancies for glass beads, which under some conditions flow in a different way from sand and poppy seeds. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800156r [article] Transient granular flows in an inclined rotating cylinder : filling and emptying [texte imprimé] / David M. Scott, Editeur scientifique ; John F. Davidson, Editeur scientifique ; Sim Ee Cheah, Editeur scientifique . - 2009 . - p. 159-165. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°1 (Janvier 2009) . - p. 159-165 Mots-clés : Transient  Granular  Flows  granular  materials  Sand  Poppy  seeds  Glass  beads Résumé : This paper reports the results of an experimental and theoretical study into transient granular flows in an inclined, slowly rotating cylinder. The granular materials used were sand, poppy seeds, and glass beads. The following situations have been studied: (i) feeding an initially empty cylinder, (ii) emptying a cylinder which is initially in steady state with equal feed and discharge flow rates, and (iii) the motion of a localized pile of granular material through the cylinder. Axial profiles of bed depth and discharge flow rates have been measured. The mechanistic model used here has previously been used to describe the transient response to large step changes in feed rate, rotation speed and angle of inclination; it has no free parameters. There is good agreement between theory and experiment for sand and poppy seeds, but there are discrepancies for glass beads, which under some conditions flow in a different way from sand and poppy seeds. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800156r