Stationary instabilities in a dielectric liquid layer subjected to an arbitrary unipolar injection and an adverse thermal gradient

The effect of temperature variations of both ionic mobility and dielectric constant on the stability of a horizontal layer of dielectric liquid subjected to a DC electric field with heating and an arbitrary injection of unipolar charge from below is analysed. The marginal stability boundaries for steady convection are determined by numerical solution of the linearised thermo-electrohydrodynamic perturbation equations.