The onset of electrothermoconvection in a viscoelastic dielectric fluid layer with internal heat source: Navier-Stokes-Voigt model

Abstract

In the present paper, the combined effect of a vertical alternating current (AC) electric field and a vertical temperature gradient on a horizontal layer of viscoelastic dielectric fluid with internal heat source/heat sink has been investigated using Navier-Stokes–Voigt model. A linear stability analysis employing the normal mode technique is conducted in the present problem for free boundaries, considering cases of heating the fluid layer from below and above separately. The effect of the electric field and internal heat source/heat sink is analysed numerically on the fluid system for stationary convection using the software MATHEMATICA and also predicted graphically.