RESEARCH PAPERS: Forced Convection

Experimental Study of Forced Convection From Isothermal Circular and Square Cylinders and Toroids

[+] Author and Article Information
G. Refai Ahmed

Advanced Thermal Engineering, R-Theta Inc., 2-130 Matheson Blvd. E., Mississauga, Ontario, Canada, L4Z 1Y6

M. M. Yovanovich

Microelectronics Heat Transfer Laboratory, Department of Mechanical Engineering, University of Waterloo, Waterloo, Ontario, Canada, N2L 3G1

J. Heat Transfer 119(1), 70-79 (Feb 01, 1997) (10 pages) doi:10.1115/1.2824102 History: Received November 08, 1995; Revised May 31, 1996; Online December 05, 2007


Experimental studies of forced convection heat transfer from different body shapes were conducted to determine the effects of Reynolds number and different characteristic body lengths on the area-averaged Nusselt number. Although the bodies differed significantly in their shapes, they had approximately the same total surface area, A = 11,304 mm2 ± 5%. This ensured that for a given free stream velocity and total heat transfer rate all bodies had similar trends for the relationship of Nusselt and Reynolds numbers. The experimental program range was conducted in the Reynolds number range 104 ≤ ReA ≤ 105 and Prandtl number 0.71. Finally, the empirical models for forced convection heat transfer were developed. These empirical models were valid for a wide range of Reynolds numbers 0 ≤ ReA ≤ 105. The present experimental correlations were compared with available correlation equations and experimental data. These comparisons show very good agreement.

Copyright © 1997 by The American Society of Mechanical Engineers
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