Effect of Suspended Particles on a Couple-Stress Rivlin-Ericksen Ferromagnetic Fluid Heated from Below in a Porous Medium, with Varying Gravity and Magnetic Field.

Abstract

In this paper we have investigated the effect of suspended particles on a couple-stress Rivlin-Ericksen ferromagnetic fluid heated from below in saturating a porous medium, varying gravity and magnetic field. The dispersion relation has been obtained and clarified analytically using the normal mode principle and linear stability theory. For stationary conventions, it is found that suspended particles always have a destabilizing effect for λ > 0 and a stabilizing effect for λ < 0. In the absence of a magnetic field, oscillatory modes are not allowed and the principle of exchange of stability is satisfied. Oscillatory modes and stability in the system are introduced due to the presence of a magnetic field