Natural convection on discrete heaters in a square enclosure with ventilation ports

Heat transfer by natural convection in a square enclosure with ventilation ports and discrete heat sources with constant heat flux has been studied. The study has been carried out by solving numerically mass, momentum and energy equations with the Boussinesq approximation. Firstly, optimum heater po...

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Bibliographic Details
Published in:The International journal of heat and fluid flow 2008-08, Vol.29 (4), p.1182-1189
Main Authors: Bilgen, E., Balkaya, A.
Format: Article
Language:English
Subjects:
Applied sciences
Constructal
Design. Technologies. Operation analysis. Testing
Electronics
Exact sciences and technology
Heat sources
Integrated circuits
Natural convection
Optimum position
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Square cavity
Ventilation
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Summary:Heat transfer by natural convection in a square enclosure with ventilation ports and discrete heat sources with constant heat flux has been studied. The study has been carried out by solving numerically mass, momentum and energy equations with the Boussinesq approximation. Firstly, optimum heater positions were obtained by maximizing the global conductance at different Rayleigh numbers. Heat transfer by natural convection was then studied with one, two and three heaters at their optimum positions. The results have revealed that the distribution of the heaters is not at equidistance but closer to each other near the bottom of the enclosure. The Nusselt number and the volume flow rate are increasing function of the Rayleigh number, the heater size and the number of discrete heaters. Their dependence on these parameters is equally important.
ISSN:0142-727X
1879-2278
DOI:10.1016/j.ijheatfluidflow.2008.01.013