Investigation of Natural Convection Heat Transfer Coefficient on Extended Vertical Base Plates
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Abstract
In this research, Computational analysis of the laminar natural convection on vertical surfaces has been in-vestigated. Natural convection is observed when density gradients are present in a fluid acted upon by a gravitational field. Our example of this phenomenon is the heated vertical plate exposed to air, which, far from the plate, is motionless. The CFD simulations are carried out using fluent software. Governing equa-tions are solved using a finite volume approach. Coupling between the velocity and pressure is made with SIMPLE algorithm. The resultant system of discretized linear algebraic equations is solved with an alternat-ing direction implicit scheme. Then a configuration of rectangular fins is put in different ways on the surface and natural convection heat transfer coefficient on these no slope surfaces is studied and finally optimization is done.
- O. G. Martynenko and P. Khramtsov, “Free-Convection Heat Transfer,” Springer, new York, 2005.
- R. J. Jofre and R. F. Baron, “Free Convection to a Roughplate,” American Society of Mechanical Engineers Paper, Vol. 33, No. 67, 1986, pp. 965-981.
- E. R. G. Eckert and T. W. Jackson, “Analysis of Turbulent Free Convection Boundary Layer on Flat Plate,” NCA Report 1015, Vol. 1, No. 2, 1951, pp. 257-261.
- A. E. Bergles and G. H. Junkhan, “Energy Conservation via Management Quarterly,” Progress Report, No. COO- 4649-59, 31 March 1979, pp. 346-348.
- S. H. Bhavnani and A. E. Bergles, “Effect of Surface Geometry and Orientation on Laminar Natural Convection from a Vertical Flat Plate with Transverse Roughness Elements,” International Journal of Heat Mass Transfer, Vol. 33, No. 5, 1990, pp. 965-981. doi:10.1016/0017-9310(90)90078-9
- P. E. Rubbert, “The Emergence of Advanced computational methods in the aerodynamic Design of commercial Transport aircraft,” Proceedings of International symposium on Computational Fluid Dynamics, Vol. 1, No. 4, 1984, pp. 42-48.
- S. W. Churchill and R. Usagi, “A General Expression for the Correlation of Rates of Transfer and other Phenomena,” AIChe Journal, Vol. 18, No. 6, 1972, pp. 1121- 1128. doi:10.1002/aic.690180606
- H. P. Kavehpour, M. Faghri and Y. Asako, “Effects of Compressibility and Rarefaction on Gaseous Flows in Microchannels,” An International Journal of Computation and Methodology, Vol. 32, No. 7, 1997, pp. 41-47. doi: 10.1080/10407789708913912
- D. D. Gray and A. Giorgini, “The Validity of the Boussinesq Approximation for Liquids and Gases,” International Journal of Heat and Mass Transfer, Vol. 19, No. 5, pp. 545-551, 1976. doi:10.1016/0017-9310(76)90168-X
- B. Yazicio?lu and H. Yüncü, “Optimum Fin Spacing of Rectangular Fins on a Vertical Base in Free Convection Heat Transfer,” Journal of Heat Mass Transfer, Vol. 44, No. 1, pp. 11-21. doi: 10.1007/s00231-006-0207-6