Interfacial instability: a new approach to transient EHD motion with unipolar injection

Author

Cross, J.D. ; Wang, H.T.

Author_Institution

Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada

Volume

26

Issue

4

fYear

1991

fDate

8/1/1991 12:00:00 AM

Firstpage

641

Lastpage

646

Abstract

The electrohydrodynamic (EHD) instability of an insulating liquid subjected to a transient unipolar injection is investigated. A novel model based on the EHD instability of the interface between the space-charge layer in front of an injecting electrode and the bulk of an insulating liquid is proposed. One of the important features for transient unipolar injection, the time delay, is studied using this model. There is good agreement between times predicted by this model and published data. It appears that the EHD instability is governed by the dynamics of the interface rather than by the development of a quasi-static critical voltage across the space-charge layer

Keywords

electric breakdown of liquids; electrohydrodynamics; interface phenomena; space charge; EHD instability; electrohydrodynamic instability; insulating liquid; interfacial instability; space-charge layer; time delay; transient EHD motion; transient unipolar injection; unipolar injection; Delay effects; Dielectric liquids; Electrodes; Permittivity; Poisson equations; Predictive models; Space charge; Steady-state; Viscosity; Voltage;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.83684

Filename

83684