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Titre :
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Experimental research of fluid flow and convection heat transfer in plate channels filled with glass or metallic particles
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Auteurs :
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P. Jiang ;
Z. Wang ;
Z. Ren ;
B. Wang
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Type de document :
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article/chapitre/communication
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Année de publication :
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1999
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Format :
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p. 45-54
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Langues:
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= Anglais
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Catégories :
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SCIENCES FONDAMENTALES ET APPLIQUEES
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Mots-clés:
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MILIEU POREUX
;
ECOULEMENT EN CONDUITE
;
TRANSFERT DE CHALEUR
;
CONVECTION FORCEE
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Résumé :
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Fluid flow and forced convection heat transfer was investigated experimentally in a plate channel filled with glass, stainless steel or bronze spherical particles. The test section was 58 mm x 80 mm x 5 mm with water as the working fluid. The local wall temperature distribution was measured along with the inlet and outlet fluid temperature and pressures. The porous media greatly increased the heat transfer coefficient although the hydraulic resistance was increased even more. The effects of particle diameter, particle thermal conductivity and fluid velocity were examined for a wide range of thermal conductivities (from 75.3 W/(mK) for bronze to 0.744 W/(mK) for glass) and for three nominal particle sizes (0.278, 0.428 and 0.7 mm). The coolant water flow rate in the porous plate channel ranged from 0.01568 to 0.1992 kg/s. The Nusselt number and the heat transfer coefficient increased with decreasing bronze particle diameter, but decreased with decreasing glass particle diameter. A modified criterion was developed to judge the effect of d(p) on the heat transfer coefficient. The Nusselt number and the heat transfer coefficient increased with increasing thermal conductivity of the packing material.
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Source :
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Experimental Thermal and Fluid Science, vol.20
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