Journal
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
Volume 48, Issue 10, Pages 1978-1987Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ijthermalsci.2009.02.012
Keywords
Entropy generation; Turbulent natural convection; Internal heat generation; Lattice Boltzmann method
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Funding
- Alexander von Humboldt Foundation, Germany.
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In this study numerical predictions of entropy generation in turbulent natural convection due to internal heat generation in a square cavity are reported for the first time. Results of entropy generation analysis are obtained by solving the entropy generation equation. The values of velocity and temperature, which are the inputs of the entropy generation equation, are obtained by an improved thermal lattice-BGK model proposed in this paper. The analyzed range is wide, varying from the steady laminar symmetric state to the fully turbulent state. Distributions of entropy generation numbers, for various Rayleigh numbers, Prandtl numbers, and Eckert numbers, are given. (C) 2009 Elsevier Masson SAS. All rights reserved.
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