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Rana G.C.,Sidharth Government Degree College
Bulletin of the Polish Academy of Sciences: Technical Sciences | Year: 2014

In this paper, the effect of magnetic field on thermal convection in couple-stress fluid saturating a porous medium is considered. By applying linear stability theory and the normal mode analysis method, a mathematical theorem is derived which states that the viscoelastic thermal convection at marginal state, cannot manifest as stationary convection if the thermal Rayleigh number R, the medium permeability parameter Pl the couple-stress parameter F and the Chandrasekher number Q, satisfy the inequality R ≤ 4π2/Pl (1 + 2π2F + PlQ/2ε), the result clearly establishes the stabilizing character of couple-stress parameter and magnetic field whereas destabilizing character of medium permeability. Copyright © BPASTS-2014. Source

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