Abstract
The thermosolutal instability of an Oldroydian viscoelastic fluid in porous medium is considered. The effects of uniform rotation and uniform magnetic field, separately, have also been studied. The stable solute gradient, rotation and magnetic field are found to have stabilizing effects on the system. The medium permeability has destabilizing effect but in the presence of rotation it has both stabilizing and destabilizing effects depending on the rotation parameter. The magnetic field, rotation and stable solute gradient introduce oscillatory modes in the system which were non-existent in their absence.
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