Natural Convection of a Heat-Generating Fluid Within Closed Vertical Cylinders and Spheres

[+] Author and Article Information
R. J. Kee, C. S. Landram

Aerothermodynamics Division 8111, Sandia Laboratories, Livermore

J. C. Miles

Monsanto Research Corp., Mound Laboratory, Miamisburg, Ohio

J. Heat Transfer 98(1), 55-61 (Feb 01, 1976) (7 pages) doi:10.1115/1.3450469 History: Received October 21, 1975; Online August 11, 2010


Steady natural convective flow fields were numerically and experimentally characterized for 0.7 Prandtl number fluids having constant, uniformly distributed, internal heat sources. The bounding isothermal walls containing the fluid were considered to be either a sphere or a cylinder of finite height. An instrumented cylinder containing radioactive tritium gas was used to demonstrate experimental and analytical agreement for local temperatures over a range of Grashof numbers. For the spherical geometry, a generalized correlation was obtained for the surface-averaged Nusselt number as a function of a modified Grashof number.

Copyright © 1976 by ASME
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