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A 2D hybrid model of the fluid flow and heat transfer in a reciprocating active magnetic regenerator / Pablo A. Oliveira in International journal of refrigeration, Vol. 35 N° 1 (Janvier 2012) 

Public ISBD [article]  in International journal of refrigeration > Vol. 35 N° 1 (Janvier 2012) . - pp. 98–114 Titre : A 2D hybrid model of the fluid flow and heat transfer in a reciprocating active magnetic regenerator Titre original : Modèle hybride bidimensionnel pour l'écoulement du fluide et le transfert de chaleur dans un régénérateur actif magnétique alternatif Type de document : texte imprimé Auteurs : Pablo A. Oliveira, Auteur ; Paulo V. Trevizoli, Auteur ; Jader R. Barbosa Jr., Auteur Année de publication : 2012 Article en page(s) : pp. 98–114 Note générale : Génie mécanique Langues : Anglais (eng) Mots-clés : Modelling  Simulation  Regenerator  Magnetic  refrigerator  Cooling  rate  Thermal  analysis Résumé : This paper evaluates the thermal behavior of a magnetic-Brayton-based parallel plate reciprocating active magnetic regenerator (AMR). A time-dependent, 2D model of the fluid flow and the coupled heat transfer between the working fluid and the solid refrigerant (gadolinium) is proposed. A hybrid calculation method which consists of an analytical solution for the flow and a numerical solution for the thermal field has been adopted. Results for the cooling capacity as a function of the temperature span and mass flow rate agree well with trends observed in experimental data and other theoretical models available in the literature. The volume of fluid displaced through the channels during the isofield processes influences significantly the AMR performance. For a cycle frequency of 1 Hz, the cycle-averaged cooling capacity reaches a maximum when the utilization factor is 0.1 and the displaced fluid volume equals 62% of the fluid volume of the AMR. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711002118 [article] A 2D hybrid model of the fluid flow and heat transfer in a reciprocating active magnetic regenerator = Modèle hybride bidimensionnel pour l'écoulement du fluide et le transfert de chaleur dans un régénérateur actif magnétique alternatif [texte imprimé] / Pablo A. Oliveira, Auteur ; Paulo V. Trevizoli, Auteur ; Jader R. Barbosa Jr., Auteur . - 2012 . - pp. 98–114. Génie mécanique Langues : Anglais (eng) in International journal of refrigeration > Vol. 35 N° 1 (Janvier 2012) . - pp. 98–114 Mots-clés : Modelling  Simulation  Regenerator  Magnetic  refrigerator  Cooling  rate  Thermal  analysis Résumé : This paper evaluates the thermal behavior of a magnetic-Brayton-based parallel plate reciprocating active magnetic regenerator (AMR). A time-dependent, 2D model of the fluid flow and the coupled heat transfer between the working fluid and the solid refrigerant (gadolinium) is proposed. A hybrid calculation method which consists of an analytical solution for the flow and a numerical solution for the thermal field has been adopted. Results for the cooling capacity as a function of the temperature span and mass flow rate agree well with trends observed in experimental data and other theoretical models available in the literature. The volume of fluid displaced through the channels during the isofield processes influences significantly the AMR performance. For a cycle frequency of 1 Hz, the cycle-averaged cooling capacity reaches a maximum when the utilization factor is 0.1 and the displaced fluid volume equals 62% of the fluid volume of the AMR. ISSN : 0140-7007 En ligne : http://www.sciencedirect.com/science/article/pii/S0140700711002118