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an analysis of the entropy generation in a square enclosure熵的分析生成在一个方形外壳
Entropy 2003, 5, 496-505 496
Entropy
ISSN 1099-4300
/entropy/
An Analysis Of The Entropy Generation In A Square Enclosure
1 2 3
Latife Berrin Erbay , Zekeriya Altaç , Birsen Sülüş
Osmangazi University, School of Engineering and Architecture 26480 Batı Meselik, Eskişehir Turkey.
Tel: 90 222 239 10 74, Fax: +90 222 229 05 35,
E-mails:1. lberbay@.tr , 2. zaltac@.tr, 3. bsulus@.tr
Received: 22 July 2003/ Accepted: 22 December 2003 / Published: 31 December 2003
_________________________________________________
Abstract: The entropy generation during transient laminar natural convection in a square
enclosure is numerically investigated. Two different cases are considered. The enclosure is
heated either completely or partially from the left side wall and cooled from the opposite
side wall. The bottom and the top of the enclosure are assumed as insulated. The Boussinesq
approximation is used in the natural convection modelling. The solutions are obtained from
quiescent conditions proceeded through the transient up to the steady-state. The calculations
2 8
are made for the Prandtl numbers 0.01 and 1.0 and Rayleigh numbers between 10 – 10 .
The entropy generation and the active places triggering the entropy generation are obtained
for each case after the flow and thermal characteristics are determined. It is found that the
active sites in the completely heated case are at the left bottom
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