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RESEARCH PAPERS

Numerical Predictions of Local Entropy Generation in an Impinging Jet

[+] Author and Article Information
M. K. Drost, M. D. White

Pacific Northwest Laboratory, Richland, WA 99352

J. Heat Transfer 113(4), 823-829 (Nov 01, 1991) (7 pages) doi:10.1115/1.2911209 History: Received October 13, 1989; Revised April 23, 1991; Online May 23, 2008

Abstract

Local entropy generation rates related to viscous dissipation and heat transfer across finite temperature differences can be calculated for isotropic and Newtonian fluids from the temperature and velocity fields in a thermal process. This study consisted of the development of a numerical procedure for the prediction of local entropy generation rates and the application of that procedure to convective heat transfer associated with a fluid jet impinging on a heated wall. The procedure involved expanding an existing computation fluid dynamics computer code to include the numerical calculation of local entropy generation. The modified code was bench-marked against analytical solutions and was then used to simulate a cold fluid jet impinging on a hot wall. The results show that the calculation of local entropy generation is feasible and can provide useful information.

Copyright © 1991 by The American Society of Mechanical Engineers
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