Mixed Convection in Ducts With Asymmetric Wall Heat Fluxes

[+] Author and Article Information
Win Aung

Division of Mechanics, Structures, and Materials Engineering, National Science Foundation; Department of Mechanical Engineering, Howard University, Washington, DC

G. Worku

Grove Engineering Inc., Gaithersburg, MD

J. Heat Transfer 109(4), 947-951 (Nov 01, 1987) (5 pages) doi:10.1115/1.3248208 History: Received June 10, 1985; Online October 20, 2009


Results are presented of a numerical study dealing with combined free and forced laminar convection in a parallel plate vertical channel with asymmetric wall heating at uniform heat fluxes (UHF). The forced flow at the inlet is assumed to be spatially uniform and directed vertically upward. Quantitative information is provided pertaining to the effects of buoyancy and asymmetric heating on the hydrodynamic and thermal parameters. For values of Gr/Re up to 500 no flow reversal is predicted, in contrast to the case of uniform wall temperatures (UWT) recently reported. Other fundamental differences between UHF and UWT also are indicated.

Copyright © 1987 by ASME
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