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Experimental study on the flow and heat transfer characteristics of a tetra-n-butyl ammonium bromide hydrate slurry (first report: Flow characteristics) / Hiroyuki Kumano in International journal of refrigeration, Vol. 34 N° 8 (Décembre 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 8 (Décembre 2011) . - pp. 1953–1962 Titre : Experimental study on the flow and heat transfer characteristics of a tetra-n-butyl ammonium bromide hydrate slurry (first report: Flow characteristics) Titre original : Etude expérimentale sur les caractéristiques d’écoulement et de transfert de chaleur d’un coulis de hydrate de bromure de tétra-n-butylammonium Type de document : texte imprimé Auteurs : Hiroyuki Kumano, Auteur ; Tetsuo Hirata, Auteur ; Tomoya Kudoh, Auteur Année de publication : 2012 Article en page(s) : pp. 1953–1962 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Hydrate  Two-phase  flow  Pressure  drop  Non-Newtonian  fluid Résumé : The flow characteristics of a tetra-n-butyl ammonium bromide hydrate slurry were investigated experimentally. Reynolds number, tube diameter and solid fraction were varied as the experimental parameters. For laminar flow, it was found that the ratio of the coefficients of pipe friction increases with solid fraction, and the rate of increase is high in the case of a low Reynolds number. For turbulent flow, the ratio of the coefficients of pipe friction was approximately 1 for all tube diameters at low solids fraction. It then decreased slightly at a particular solid fraction and increased again at high solid fraction. Theoretical analysis was carried out using the experimental results, and it was found that the flow characteristics of the hydrate slurry can be treated as those of a pseudoplastic fluid and clarified using the apparent Reynolds number. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001423 [article] Experimental study on the flow and heat transfer characteristics of a tetra-n-butyl ammonium bromide hydrate slurry (first report: Flow characteristics) = Etude expérimentale sur les caractéristiques d’écoulement et de transfert de chaleur d’un coulis de hydrate de bromure de tétra-n-butylammonium [texte imprimé] / Hiroyuki Kumano, Auteur ; Tetsuo Hirata, Auteur ; Tomoya Kudoh, Auteur . - 2012 . - pp. 1953–1962. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 8 (Décembre 2011) . - pp. 1953–1962 Mots-clés : Hydrate  Two-phase  flow  Pressure  drop  Non-Newtonian  fluid Résumé : The flow characteristics of a tetra-n-butyl ammonium bromide hydrate slurry were investigated experimentally. Reynolds number, tube diameter and solid fraction were varied as the experimental parameters. For laminar flow, it was found that the ratio of the coefficients of pipe friction increases with solid fraction, and the rate of increase is high in the case of a low Reynolds number. For turbulent flow, the ratio of the coefficients of pipe friction was approximately 1 for all tube diameters at low solids fraction. It then decreased slightly at a particular solid fraction and increased again at high solid fraction. Theoretical analysis was carried out using the experimental results, and it was found that the flow characteristics of the hydrate slurry can be treated as those of a pseudoplastic fluid and clarified using the apparent Reynolds number. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001423

Experimental study on the flow and heat transfer characteristics of a tetra-n-butyl ammonium bromide hydrate slurry (second report: Heat transfer characteristics) / Hiroyuki Kumano in International journal of refrigeration, Vol. 34 N° 8 (Décembre 2011) 

Public ISBD [article]  in International journal of refrigeration > Vol. 34 N° 8 (Décembre 2011) . - pp. 1963–1971 Titre : Experimental study on the flow and heat transfer characteristics of a tetra-n-butyl ammonium bromide hydrate slurry (second report: Heat transfer characteristics) Titre original : Etude expérimentale sur les caractéristiques d'écoulement et de transfert de chaleur d'un coulis de hydrate de bromure de tétra-n-butylammonium (deuxième partie : caractéristiques du transfert de chaleur) Type de document : texte imprimé Auteurs : Hiroyuki Kumano, Auteur ; Tetsuo Hirata, Auteur ; Tomoya Kudoh, Auteur Année de publication : 2012 Article en page(s) : pp. 1963–1971 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Hydrate  Two-phase  flow  Heat  transfer  Non-newtonian  fluid Résumé : The heat transfer characteristics of a tetra-n-butyl ammonium bromide hydrate slurry were investigated where the Reynolds number, tube diameters and solid fraction were varied as experimental parameters. For laminar flow, it was found that the ratio of Nusselt numbers increased with solid fraction. An approximation of Nusselt number could be derived using the Graetz number on the basis of the apparent Reynolds number, the solid fraction and the ratio of the average diameter of the hydrate particles to the test tube diameter. For turbulent flow conditions, the ratio of Nusselt numbers had a value of one for each condition at low solid fractions. The ratio of Nusselt numbers increased with solid fraction in the high solid fraction region. Moreover, the apparent Reynolds number, which can be derived by treating the hydrate slurry as a pseudoplastic fluid, can be used to determine the condition under which hydrate slurry heat transfer characteristics vary under turbulent flow. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001435 [article] Experimental study on the flow and heat transfer characteristics of a tetra-n-butyl ammonium bromide hydrate slurry (second report: Heat transfer characteristics) = Etude expérimentale sur les caractéristiques d'écoulement et de transfert de chaleur d'un coulis de hydrate de bromure de tétra-n-butylammonium (deuxième partie : caractéristiques du transfert de chaleur) [texte imprimé] / Hiroyuki Kumano, Auteur ; Tetsuo Hirata, Auteur ; Tomoya Kudoh, Auteur . - 2012 . - pp. 1963–1971. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 34 N° 8 (Décembre 2011) . - pp. 1963–1971 Mots-clés : Hydrate  Two-phase  flow  Heat  transfer  Non-newtonian  fluid Résumé : The heat transfer characteristics of a tetra-n-butyl ammonium bromide hydrate slurry were investigated where the Reynolds number, tube diameters and solid fraction were varied as experimental parameters. For laminar flow, it was found that the ratio of Nusselt numbers increased with solid fraction. An approximation of Nusselt number could be derived using the Graetz number on the basis of the apparent Reynolds number, the solid fraction and the ratio of the average diameter of the hydrate particles to the test tube diameter. For turbulent flow conditions, the ratio of Nusselt numbers had a value of one for each condition at low solid fractions. The ratio of Nusselt numbers increased with solid fraction in the high solid fraction region. Moreover, the apparent Reynolds number, which can be derived by treating the hydrate slurry as a pseudoplastic fluid, can be used to determine the condition under which hydrate slurry heat transfer characteristics vary under turbulent flow. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711001435