In this paper, we solve numerically the entire set of equations associated with electro-thermo-convective phenomena that take place in a planar layer dielectric liquid heated from below and subjected to unipolar injection. For first time whole coupled is solved: Navier–Stokes equations, electrohydrodynamic (EHD) energy equation. We validate numerical simulation by comparing electro-convection stability criteria ones obtained approach. The solution electro-thermo-convection problem then...

In this paper the behaviour of waves generated on insulating liquid-air interfaces and subjected to an electric field is experimentally studied. The experimental device mainly composed a tank filled with diesel oil two parallel metallic electrodes; one them immersed in liquid brought high potential other placed above liquid. are created by vibrator frequency amplitude which controlled. charges present at liquid/air interface come from injection and/or dissociation conduction phenomena. A...

The electro-thermo-convective motion in a plane horizontal dielectric liquid layer subjected to simultaneous action of electric field and thermal gradient is numerically investigated. We consider the case strong unipolar charge injection C = 10 from above or below. Therefore this context, we only take into account Coulomb force, disregarding one. effect on heat transfer analyzed through characterization time history Nusselt number as well its evolution according characteristic dimensionless...

The influence of the electric field on surface waves in diesel oil is studied experimentally. experimental device mainly composed a tank filled with and two parallel metallic electrodes: one them immersed liquid brought to high potential, other placed above liquid. are generated by vibrator for which frequency amplitude vibrations can be controlled. differences potential applied vary. Particle Image Velocimetry (PIV) used measure velocity propagation oil/air surface. objective determine...

The article deals with the propagation of surface waves in a tank filled dielectric liquid. are created by vibrator, frequency and amplitude which controlled. Two parallel metallic electrodes placed an adjustable potential difference is applied between them. immerged electrode injects electric charges into liquid top-electrode attracts They remain on liquid-gas interface therefore becomes electrically charged. A high velocity camera records shape associated image analysis system extracts...

We study the electro-thermo-convective phenomena in a dielectric liquid layer of depth H placed between two electrodes and subjected to simultaneous action an electric field thermal gradient. The full set governing equations is directly solved using finite volume method. In this paper we first heat from lower electrode apply potential when steady state obtained. Only case strong injection charges considered. flow pattern Nusselt number strongly depend on following non dimensional...

In this paper, the instability of two layers insulating and conducting immiscible liquids separated by a deformable interface subjected to unipolar injection is examined. Taking into account slight deformation between liquids, system equations boundary conditions derived at marginal state. Non zero numerical solutions for both exist only eigenvalues parameter T, which depends on following parameters: level C, Bond number Bo, new non-dimensional P proportional interfacial tension ratio...

This paper presents a fundamental study of electro-thermo-convective flows within layer dielectric liquid subjected to both an electric field and thermal gradient. A low-conductivity enclosed between two horizontal electrodes unipolar charge injection is considered. The interplay fields ignites complex physical interactions the flows, all governed by set coupled electro-thermo-hydrodynamic equations. These equations include Maxwell, Navier–Stokes, energy are solved numerically using in-house...

In this article we study the electro-thermo-convective phenomena in a dielectric liquid layer placed between two electrodes and subjected to simultaneous action of an electric field thermal gradient. The full set coupled equations: Navier-Stokes, Electro-Hydro-Dynamic (EHD) Heat Transfer equations are directly solved 2D cavity using finite volume method. order characterize influence on heat transfer first till steady state is obtained then apply potential charge injected from lower...

The electro thermal convection in a plane layer of dielectric liquid subjected to simultaneous action electric field and gradient is studied. influence the forces on convective flow analyzed case weak charge injection. set equations associated with thermo-electro phenomena solved directly using finite volume method. results are configuration cavity heating from below injection below. values EHD instability criteria T <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...

In this article we analyse the results of a numerical simulation an electro-thermo-convective flow induced in dielectric liquid layer by simultaneous action external electric field and thermal gradient. A low conductivity is placed between two horizontal electrodes subjected to strong unipolar charge injection which set fluid motion under combined Coulomb buoyancy forces. The has vigorous character strongly increases transfer heat electrodes. full governing equations including Navier-Stokes...

In this article the hydrodynamic instability of a horizontal two-layer system consisting insulating and conducting immiscible liquids layers comprised between two rigid electrodes subjected to unipolar injection is examined. A theoretical model taking into account slight deformation interface developed equations boundary conditions at marginal state (for which smallest eigenvalue leads critical for instability) derived. The general numerical solution systems relative constructed specified...