Abstract

This study proposes to investigate the effects of latent heat transfer, in association with the water vapor evaporation from the wetted channel wall, on the natural convection heat transfer. Major nondimensional groups identified areGr T ,Gr M ,Pr, Sc andφ. Results are especially presented for an air-water system under various heating conditions. The influences of channel length, wetted wall temperatures and the relative humidity of the moist air in the ambient on the heat and mass transfer are examined in great detail. Tremendous enhancement in heat transfer due to the exchange of the latent heat of vaporization is clearly demonstrated.

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