In this paper, the effect of a magnetic field on natural convection of non-Newtonian power-law fluids in a cavity with a linearly heated wall has been analyzed by Finite Difference Lattice Boltzmann method (FDLBM). This study has been performed for the certain pertinent parameters of Rayleigh number (Ra=104and 105), Hartmann number (Ha=0, 15, 30 and 60) and power-law index (n=0.5-1.5) as the magnetic field is applied horizontally. Results indicate that the augmentation of the power-law index in the absence of the magnetic field causes heat transfer to drop. The magnetic field decreases heat transfer in different power-law indexes generally. The increment of the magnetic field power declines the effect of the power-law index on heat transfer. The magnetic field for various Hartmann numbers at Ra=104provokes heat transfer to increase with the enhancement of power-law index. At Ra=105, the heat transfer falls with the rise of the power-law index for Ha=15 and 30 as the effect is weakened by the increase of Hartmann number significantly. However, the increase in power-law index augments heat transfer at Ha=60. © 2014 Elsevier B.V.

Item Type:	Refereed Article
Keywords:	MHD, convection
Research Division:	Engineering
Research Group:	Fluid mechanics and thermal engineering
Research Field:	Experimental methods in fluid flow, heat and mass transfer
Objective Division:	Energy
Objective Group:	Energy transformation
Objective Field:	Energy transformation not elsewhere classified
UTAS Author:	Kefayati, GHR (Dr Gholamreza Kefayati)
ID Code:	127729
Year Published:	2014
Web of Science® Times Cited:	43
Deposited By:	Engineering
Deposited On:	2018-08-10
Last Modified:	2018-09-11
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