Effect of rotation on ferrothermohaline convection saturating a porous medium

The double diffusive effect of ferro thermohaline convective instability in a ferro fluid, saturating a rotating porous medium heated from below and s alted from above, has been studied using Brinkman and Darcy models. The eff ect of salinity has been incorporated in the magnetization and density of t he ferro fluid. Linear stability analysis is carried out. The onset of ther mohaline convection is analysed both by stationary as well as oscillatory m odes. In all cases it is found that the porous medium of small permeability and large rotation tend to stabilize the system. It has been observed that stationary mode is favourable for Darcy model whereas for Brinkman model, possibility of oscillatory mode of instability cannot be ruled out. It is a lso found that the ratio of mass transport to heat transport decides the st abilizing factor. Numerical computations are made and are illustrated graph ically.