Theoretical study of EHD instability in a system of conducting and insulating liquids at unipolar injection

Author

Koulova Nenova, D. ; Slavtchev, S.

Author_Institution

Inst. of Mech., Acad. G. Bontchev, Sofia, Bulgaria

fYear

1993

fDate

19-23 Jul 1993

Firstpage

524

Lastpage

528

Abstract

Two layers of insulating and conducting viscous liquids confined between two plane parallel electrodes and subjected to a unipolar ion injection are considered. The linear electrohydrodynamic instability in this system is studied theoretically. The critical Rayleigh numbers are determined for a wide range of parameters: weak and strong injections, by rigid electrode or through the liquid-liquid interface, for different ratios of the liquid viscosities and liquid layer thicknesses. The viscous shear forces acting at the liquid interface have a destabilizing effect in comparison with the case of a single layer between rigid electrodes or a rigid electrode and the free surface

Keywords

dielectric liquids; EHD instability; conducting viscous liquids; critical Rayleigh numbers; insulating liquids; linear electrohydrodynamic instability; liquid-liquid interface; plane parallel electrodes; unipolar injection; unipolar ion injection; viscous shear forces; Dielectric liquids; Dielectrics and electrical insulation; Electrodes; Permittivity; Space charge; Stability analysis; Stability criteria; Steady-state; Threshold voltage; Viscosity;

fLanguage

English

Publisher

ieee

Conference_Titel

Conduction and Breakdown in Dielectric Liquids,1993., ICDL '93., IEEE 11th International Conference on

Conference_Location

Baden-Dattwil

Print_ISBN

0-7803-0791-7

Type

conf

DOI

10.1109/ICDL.1993.593998

Filename

593998