Transient Laminar Mixed Convective Heat Transfer in a Vertical Flat Duct

[+] Author and Article Information
T. F. Lin, C. P. Yin, W. M. Yan

Department of Mechanical Engineering, National Chiao Tung University, Hsinchu, Taiwan

J. Heat Transfer 113(2), 384-390 (May 01, 1991) (7 pages) doi:10.1115/1.2910573 History: Received September 26, 1989; Revised July 14, 1990; Online May 23, 2008


Unsteady laminar aiding and opposing mixed convection heat transfer in a vertical flat duct is numerically investigated for an initially fully developed flow. Results indicate that unsteady heat transfer characteristics in the flow are principally determined by wall-to-fluid heat capacity ratios. Effects of the buoyancy and degree of asymmetric heating or cooling are rather insignificant. Correlation equations for the time variations of local Nusselt numbers with wall-to-fluid heat capacity ratios are proposed.

Copyright © 1991 by The American Society of Mechanical Engineers
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