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1 International Journal of Applied Mechanics and Engineering

1 2003

1 Maruthamanikandan S.

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Effect of radiation on Rayleigh-Benard convection in ferromagnetic fluids

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Maruthamanikandan S.

2003

tom Vol. 8, no 3

449-459

The effect of radiative transfer on the onset of thermal convection in a ferromagnetic fluid layer bounded by two parallel plates and heated from below is considered using Goody's approach. The fluid between the plates absorbs and emits thermal radiation. The Milne-Eddington approximation is employed in obtaining the initial static state. Considering infinitesimal perturbations, the critical magnetic Rayleigh number is obtained using the Rayleigh-Ritz method. It is found that radiation inhibits the onset of convection in both the transparent and opaque media. Further, the opaque medium is shown to release heat for convection more slowly than the transparent medium. It is also found that radiation affects the cell size at the onset of convection in the case of transparent medium only. The results have implications in energy conversion devices and in smart material applications.