Numerical analysis of laminar natural convection in enclosures with fins attached to an active wall |
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Authors: | N Yucel H Turkoglu |
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Institution: | (1) Mechanical Engineering Department Faculty of Engineering and Architecture Gazi University 06570 Maltepe, Ankara, Turkey, TR |
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Abstract: | Vertical enclosures with conducting fins attached to the cold wall were considered. Side walls were kept at constant but
different temperatures, while horizontal top and bottom walls were insulated. A conjugate formulation was used for the mathematical
formulation of the problem, and a computer program based on the control volume approach and the SIMPLE algorithm was developed.
Computations were performed to investigate the effects of the fin configuration and Rayleigh number on the flow structure
and heat transfer. It was observed that the heat transfer rate through an enclosure can be controlled by attaching fins to
the wall(s) of the enclosure. At low Rayleigh numbers (conduction controlled regime), the heat transfer rate increases with
the increasing number of fins and the fin length. However, at higher Rayleigh numbers (convection dominant regimes), the heat
transfer rate can be decreased or increased by properly choosing the number of fins and the fin lengths.
Received on 07 April 1997 |
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