Title :
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
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;
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
DOI :
10.1109/ICDL.1993.593998
