Effect of Nonuniform Heating on Laminar Mixed Convection in Ducts

[+] Author and Article Information
Hin-Sum Law, J. H. Masliyah, K. Nandakumar

Department of Chemical Engineering, University of Alberta, Edmonton, Alberta, T6G 2G6 Canada

J. Heat Transfer 109(1), 131-137 (Feb 01, 1987) (7 pages) doi:10.1115/1.3248033 History: Received June 10, 1985; Online October 20, 2009


Combined convection flow in square, circular, and semicircular ducts was numerically studied for axially uniform heat flux. The peripheral condition is that of the top half of the duct is insulated while the bottom half is heated. For the case of a square duct, dual solutions are obtained where the secondary flow is characterized either with two or four vortices. Regions of dual solutions have been mapped in the parameter space of aspect ratio and Grashof number. For the case of a circular duct, only the solution characterized by two vortices is obtained.

Copyright © 1987 by ASME
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