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Computational study of the effects of material properties on heat transfer in gas fluidization / Qin-Fu Hou in Industrial & engineering chemistry research, Vol. 51 N° 35 (Septembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11572-11586 Titre : Computational study of the effects of material properties on heat transfer in gas fluidization Type de document : texte imprimé Auteurs : Qin-Fu Hou, Auteur ; Zong-Yan Zhou, Auteur ; Ai-Bing Yu, Auteur Année de publication : 2012 Article en page(s) : pp. 11572-11586 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Fluidization  Heat  transfer  Properties  of  materials Résumé : Heat transfer characteristics of different powders in gas fluidization are investigated by means of a combined approach of discrete element method and computational fluid dynamics. First, the heat transfer characteristics in three flow regimes of group A powders are examined. Then, the effects of the Hamaker constant and particle size, both related to the van der Waals force, are investigated in detail. The results confirm that the convective heat transfer is dominant, and radiative heat transfer becomes important when the bed temperature is high. However, conductive heat transfer also plays a role depending on the flow regimes and material properties. Significant effects of the Hamaker constant and particle size are observed under certain conditions. Finally, an effort is made to quantify the effects of the Hamaker constant, particle size, and inlet gas velocity. The findings should be useful for better understanding and prediction of the heat transfer in gas fluidization. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324808 [article] Computational study of the effects of material properties on heat transfer in gas fluidization [texte imprimé] / Qin-Fu Hou, Auteur ; Zong-Yan Zhou, Auteur ; Ai-Bing Yu, Auteur . - 2012 . - pp. 11572-11586. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11572-11586 Mots-clés : Fluidization  Heat  transfer  Properties  of  materials Résumé : Heat transfer characteristics of different powders in gas fluidization are investigated by means of a combined approach of discrete element method and computational fluid dynamics. First, the heat transfer characteristics in three flow regimes of group A powders are examined. Then, the effects of the Hamaker constant and particle size, both related to the van der Waals force, are investigated in detail. The results confirm that the convective heat transfer is dominant, and radiative heat transfer becomes important when the bed temperature is high. However, conductive heat transfer also plays a role depending on the flow regimes and material properties. Significant effects of the Hamaker constant and particle size are observed under certain conditions. Finally, an effort is made to quantify the effects of the Hamaker constant, particle size, and inlet gas velocity. The findings should be useful for better understanding and prediction of the heat transfer in gas fluidization. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26324808