A linear analytical study of Soret-driven ferrothermohaline convection in an anisotropic porous medium

The Soret-driven ferrothermoconvective instability of multi- component fluid in an anisotropic porous medium heated from below and salted from above has been analyzed using Brinkman model for various values of anisotropic parameter. The salinity effect is contained in magnetization and density of the ferrofluid and the system is assumed to have anisotropy in the vertical direction and isotropy in the horizontal direction. A small perturbation imparted on the basic state and a linear stability analysis is used for this model for which the normal mode technique is applied. The present analysis has been carried out through both stationary as well as oscillatory modes. The vertical anisotropy tends to destabilize the system.

► We examine the effect of anisotropy and magnetization of convection in Soret effect.
► The system loses its stability for critical Rayleigh number for various parameters like Rs and K1.
► The larger temperature difference is needed to guarantee the occurring of convection.
► The Soret effect plays a dominant role for the stability of the system.