In this paper, a numerical study of three-dimensional (3D) natural convection air-cooling of two identical heat sources, simulating electronic components, mounted in a rectangular enclosure was carried out. The governing equations were solved by using the finite-volume method based on the SIMPLER algorithm. The effects of Rayleigh number Ra, spacing between heat sources d, and aspect ratios Ax in x-direction (horizontal) and Az in z-direction (transversal) of the enclosure on heat transfer were investigated. In steady state, when d is increased, the heat transfer is more important than when the aspect ratios Ax and Az are reduced. In oscillatory state, the critical Rayleigh numbers Racr for different values of spacing between heat sources and their aspect ratios, at which the flow becomes time dependent, were obtained. Results show a strong relation between heat transfers, buoyant flow, and boundary layer. In addition, the heat transfer is more important at the edge of each face of heat sources than at the center region.
Three-Dimensional Steady and Oscillatory Natural Convection in a Rectangular Enclosure With Heat Sources
Contributed by the Heat Transfer Division of ASME for publication in the Journal of Heat Transfer. Manuscript received September 8, 2014; final manuscript received January 30, 2015; published online June 1, 2016. Assoc. Editor: Ziad Saghir.
- Views Icon Views
- Share Icon Share
- Cite Icon Cite
- Search Site
Bouraoui, A., and Bessaïh, R. (June 1, 2016). "Three-Dimensional Steady and Oscillatory Natural Convection in a Rectangular Enclosure With Heat Sources." ASME. J. Heat Transfer. September 2016; 138(9): 091001. https://doi.org/10.1115/1.4032949
Download citation file:
- Ris (Zotero)
- Reference Manager