Local Heat Transfer Downstream of Abrupt Circular Channel Expansion

[+] Author and Article Information
P. P. Zemanick

Core Structural Analysis and Methods, Westinghouse Astronuclear Laboratory, Pittsburgh, Pa.

R. S. Dougall

Department of Mechanical Engineering, University of Pittsburgh, Pittsburgh, Pa.

J. Heat Transfer 92(1), 53-60 (Feb 01, 1970) (8 pages) doi:10.1115/1.3449645 History: Received January 13, 1969; Revised April 28, 1969; Online August 11, 2010


Experimental work was performed to determine local Nusselt numbers in the region beyond an abrupt expansion in a circular channel. Three expansion geometries, ratios of upstream-to-downstream diameter of 0.43, 0.54, and 0.82, were tested with air as the working fluid. Data are shown for Reynolds numbers from 4000 to 50,000–90,000 depending on geometry. Selected comparisons with previously published data for air and water are included.

Copyright © 1970 by ASME
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