1995 | OriginalPaper | Buchkapitel
Convection Heat Transfer
verfasst von : M. Kaviany
Erschienen in: Principles of Heat Transfer in Porous Media
Verlag: Springer New York
Enthalten in: Professional Book Archive
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As we consider simultaneous fluid flow and heat transfer in porous media, the role of the macroscopic (Darcean) and microscopic (pore-level) velocity fields on the temperature field needs to be examined. Experiments have shown that the mere inclusion of u D • ∇ 〈T〉 in the energy equation does not accurately account for all the hydrodynamic effects. The pore-level hydrodynamics also influence the temperature field. Inclusion of the effect of the pore-level velocity nonuniformity on the temperature distribution (called the dispersion effect and generally included in the diffusion transport) is the main concern in this chapter.