An Experimental and Theoretical Study of Heat Transfer in Vertical Tube Flows

[+] Author and Article Information
R. Greif

Department of Mechanical Engineering, University of California, Berkeley, Calif.

J. Heat Transfer 100(1), 86-91 (Feb 01, 1978) (6 pages) doi:10.1115/1.3450508 History: Received January 03, 1977; Online August 11, 2010


An experimental and theoretical study was carried out for the heat transfer in laminar and turbulent tube flows with air and argon. Radial temperature profiles were measured at a location 108 tube diameters from the inlet of the vertical, electrically heated test section. The temperature of the tube wall was also measured. The experimental data were in good agreement with the results obtained from numerical solutions of the conservation equations and from simplified, fully developed solutions. For turbulent flows the Reynolds numbers varied from 10,000 to 19,500; for laminar flows the Reynolds numbers varied from 1850 to 2100 while the Rayleigh numbers varied from 70 to 80.

Copyright © 1978 by ASME
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