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RESEARCH PAPERS

Unsteady Laminar Flow in a Duct With Unsteady Heat Addition

[+] Author and Article Information
Morris Perlmutter, Robert Siegel

Lewis Research Center, National Aeronautics and Space Administration, Cleveland, Ohio

J. Heat Transfer 83(4), 432-440 (Nov 01, 1961) (9 pages) doi:10.1115/1.3683662 History: Received August 05, 1960

Abstract

An analysis is made of transient heat transfer with transient laminar flow between heated (or cooled) parallel plates. The transient processes are caused by simultaneously changing the fluid pumping pressure and either the wall temperature or the wall heat flux. The solution is obtained for both the thermal entrance and fully developed heat-transfer regions. The slug-flow simplification is made; that is, the velocity at any instant of time is taken as uniform throughout the channel. The fluid temperature distribution, however, depends on both the axial co-ordinate and the position within the channel cross section. A few numerical examples are carried out which give some insight into various transient processes such as those occurring during a nuclear-reactor shutdown.

Copyright © 1961 by ASME
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