Numerical Study of Magnetic Field Effects on Buoyancy Driven Convection in a Non-Isothermally Heated Square Enclosure

Abstract:

Numerical simulation of natural convection heat transfer in the presence of a magnetic field is analyzed in a non-isothermally heated square enclosure. The left wall is heated and cooled with a sinusoidal heat source and the right wall is cooled isothermally. The horizontal walls of the enclosure are adiabatic. The effects of Rayleigh number (Ra = 104, 105 and 106), Hartmann number (Ha = 0, 25, 50 and 100) and amplitude of sinusoidal function (n = 0.25, 0.5 and 1) on temperature and flow fields are analyzed. It is observed that the rate of heat transfer is decreased with increasing the Hartmann number; it is also decreased when decreasing the amplitude of sinusoidal function.

• Periodical: Defect and Diffusion Forum (Volumes 312-315)
• Pages: 536-541
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.312-315.536
• Online since: April 2011
• Authors: Ghanbar Ali Sheikhzadeh, Mohsen Pirmohammadi, A. Fattahi, M.A. Mehrabian
• Keywords: Enclosure, Magnetic Field, Natural Convection

References

[1] J.P. Garandet, T. Alboussiere and R. Moreau: Int. J. Heat Mass Transf. Vol. 35 (1992), p.741.

[2] N. Rudraiah, R.M. Barron, M. Venkatachalappa and C.K. Subbaraya: Int. J. Eng. Sci., Vol. 33 (1995), p.1075.

[3] N.M. Al-Najem, K.M. Khanafer, and M.M. El-Refaee: Int. J. Numer. Methods Heat Fluid Flow, Vol. 8 (1998), p.651.

[4] M.C. Ece and E. Büyük: Meccanica, Vol. 42 (2007), p.435.

[5] M. Pirmohammadi, M. Ghassemi and G.A. Sheikhzadeh: IEEE Trans. Magnetics Vol. 45 (2009), p.407.

[6] I.E. Sarris, G.K. Zikos, A.P. Grecos and N.S. Vlachos: Numerical Heat Transfer (Part B), Vol. 50 (2006), p.157.