FERRO THERMOHALINE CONVECTION IN A POROUS-MEDIUM

The effect of a concentration gradient on double diffusive ferro-conve ction saturating a porous medium heated from below and salted from abo ve has been analysed for fixed particle suspensions causing various po rosities. The salt is a ferromagnetic salt which modifies the magnetic field established. The effect of salinity has been included in the ma gnetisation and density of the ferrofluid. For a fluid layer contained between two stress-free boundaries, the exact solution is obtained us ing a linear stability analysis. The onset of ferro-convection is stud ied by both stationary and oscillatory modes. It is found that the osc illatory mode of instability is favoured for media of larger permeabil ity and the stationary mode of instability is preferred for media of s maller permeability. Numerical computations are made and are illustrat ed graphically.