A new technique to determine convection coefficients with flow through particle beds / Xiaodong Nie in Journal of heat transfer, Vol. 133 N° 4 (Avril 2011)  

Public ISBD [article]  inJournal of heat transfer > Vol. 133 N° 4 (Avril 2011) . - pp. [041601/1-8] Titre : A new technique to determine convection coefficients with flow through particle beds Type de document : texte imprimé Auteurs : Xiaodong Nie, Auteur ; Richard Evitts, Auteur ; Robert Besant, Auteur Année de publication : 2011 Article en page(s) : pp. [041601/1-8] Note générale : Physique Langues : Anglais (eng) Mots-clés : Convection Heat transfer coefficient Correlation Transient Energy storage Spherical particle bed Uncertainty analysis Index. décimale : 536 Chaleur. Thermodynamique Résumé : A new method for determining the heat transfer coefficient for air flowing steadily through beds of particles is presented. In this technique, a step change in the inlet air temperature is applied to a small test bed and temperature distributions in the bed and at the air outlet are sampled over a short time period. The convective heat transfer coefficient is determined using data from the convective heat transfer process in the bed where the analysis includes the partial differential equation that describes the transient energy storage in the particles within the bed. The analysis is performed for a short time duration when the temperature distribution in the particle bed is almost linear along the axis of the bed. This time period permits the most accurate determination of the heat transfer coefficient using the data. Using beds of spherical particles a new correlation is developed for the Nusselt number versus the Reynolds number (5 DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&smode=strresults& [...] [article] A new technique to determine convection coefficients with flow through particle beds [texte imprimé] / Xiaodong Nie, Auteur ; Richard Evitts, Auteur ; Robert Besant, Auteur . - 2011 . - pp. [041601/1-8]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 133 N° 4 (Avril 2011) . - pp. [041601/1-8] Mots-clés : Convection Heat transfer coefficient Correlation Transient Energy storage Spherical particle bed Uncertainty analysis Index. décimale : 536 Chaleur. Thermodynamique Résumé : A new method for determining the heat transfer coefficient for air flowing steadily through beds of particles is presented. In this technique, a step change in the inlet air temperature is applied to a small test bed and temperature distributions in the bed and at the air outlet are sampled over a short time period. The convective heat transfer coefficient is determined using data from the convective heat transfer process in the bed where the analysis includes the partial differential equation that describes the transient energy storage in the particles within the bed. The analysis is performed for a short time duration when the temperature distribution in the particle bed is almost linear along the axis of the bed. This time period permits the most accurate determination of the heat transfer coefficient using the data. Using beds of spherical particles a new correlation is developed for the Nusselt number versus the Reynolds number (5 DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&smode=strresults& [...]

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