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RESEARCH PAPERS

Thermoconvective Motion of Low Prandtl Number Fluids Within a Horizontal Cylindrical Annulus

[+] Author and Article Information
J. R. Custer, E. J. Shaughnessy

Department of Mechanical Engineering and Materials Science, Duke University, Durham, N.C.

J. Heat Transfer 99(4), 596-602 (Nov 01, 1977) (7 pages) doi:10.1115/1.3450748 History: Received March 30, 1977; Online August 11, 2010

Abstract

Steady natural convection in very low Prandtl number fluids is investigated using a double perturbation expansion in powers of the Grashof and Prandtl numbers. The fluid is contained in a horizontal cylindrical annulus, the walls of which either are held at constant temperature or support a constant heat flux. In both cases the evolution of the flow for increasing Grashof number is of interest. It is found that the basic flow pattern consists of one eddy. For both boundary conditions the center of this eddy falls into the lower half of the annulus as the Grashof number increases. Such behavior is directly opposite to experimental results obtained in fluids of higher Prandtl number.

Copyright © 1977 by ASME
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