Improvment of Free Convection Heat Transfer Rateof Rectangular Heatsink on Vertical Base Plates

HamidReza Goshayeshi, Mahdi Fahiminia, Mohammad Mahdi Naserian

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DOI: 10.4236/epe.2011.34064                

Abstract

In this paper, the laminar heat transfer of natural convection on vertical surfaces is investigated. Most of the studies on natural convection have been considered constantly whereas velocity and temperature domain, do not change with time, transient one are used a lot. Governing equations are solved using a finite volume approach. The convective terms are discretized using the power-law scheme, whereas for diffusive terms the central difference is employed. Coupling between the velocity and pressure is made with SIMPLE algorithm. The resultant system of discretized linear algebraic equations is solved with an alternating direction implicit scheme. Then a configuration of rectangular fins is put in different ways on the surface and heat transfer of natural convection on these surfaces without sliding is studied and finally optimization is investigated.

Keywords

Natural Convection, Vertical Surfaces, Simple Algorithm, Rectangular Fins

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	R. J. Jofre and R. F. Baron, “Free Convection Heat Transfer to a Rough Plate,” ASME, New York, 1967.
[2]	E. R. Eckert and T. W. Jakson, “Analysis of Turbulent Free Convection Boundary on Flat Plate,” National Aeronautics and Space Administration, Washington, 1951.
[3]	S. H. BhavnAni and A. E. Bergles, “Effect of Surface Geometry and Orientation on Laminar Natural Convection Heat Transfer from a vertical Flat Plate with Transfer’s Roughness Elements,” International Journal of Heat and Mass Transfer, Vol. 44, No. 1, 1990, pp. 155-167.
[4]	P. E. Rubbert, “The Emergence of Advanced Computationalmethods in the Aerodynamicdesignof Commercial Trans Port Aircraft,” International Conference on Computational Fluid Dynamics, Vol. 1, 1986, pp. 42-48.
[5]	J. E. Green, “In Numerical Methods,” Aerodynamicfluid Dynamics,” 1982, pp. 1-39
[6]	S. W. Churchill and S. Usagi, “A General for the Correlation of Rates of Transfer and Other Phenomena,” AIChE Journal, Vol. 18, No. 6, 1979, pp. 1121-1128. doi:10.1002/aic.690180606
[7]	A. E. Bergles and G. H. Junkhan, “Energy Conservation via Heat Transfer Managementquarterly,” Progress Report No. Co. 4649-59, January 1979.
[8]	H. P. Kavehpour and M. Faghri, “Effects of Compressibility and Rarefaction on Gaseous Flows in Microchannels,” Numerical Heat Transfer, Vol. 32, No. 7, pp. 677- 696.
[9]	Gray Dand Giorgini A, “The Validity of the Boussinesq Approximation for Liquids and Gases,” International Journal of Heat and Mass Transfer, Vol. 19, No. 5, 1976, pp. 545-551. doi:10.1016/0017-9310(76)90168-X
[10]	S. V. Patankar, “Numerical Heat Transfer and Fluid Flow,” McGraw-Hill, New York, 1980.
[11]	F. Harahap and D. Setio, “Correlations for Heat Dissipation and Natural Convection Heat-Transfer from Horizontally-Based, Vertically-Finned Arrays,” International Journal of Applied Energy, Vol. 69, No. 1, 2001, pp. 29-38. doi:10.1016/S0306-2619(00)00073-8