Date of Award


Publication Type

Doctoral Thesis

Degree Name



Electrical and Computer Engineering

First Advisor

Watson, Alan,


Engineering, Electronics and Electrical.




Six dielectric liquids have been investigated for the confirmation of the EHD theory of current response to the application of ramped high voltage by using a prebreakdown technique. The conduction current and displacement current were measured and studied individually. Upon plotting conduction current as well as displacement current on a log V -log I scale, two linear portions of the current characteristics were observed in the high stress regime. Thus two separate regimes of the characteristic were found exhibiting current transport in direct proportion to a simple power of the applied voltage, $\rm I\propto V\sp{s}$ (or $\rm I \propto V\sp{g}$ with respect to displacement current), where s (or g) represented upper s$\sb{\rm u}$ (or g$\sb{\rm u}$) and lower slope s$\sb{\rm l}$ (or g$\sb{\rm l}$) values. The impact of the developments on the relationship between the maximum applied voltage and the power law is discussed. The relationship referred to is one involving both s values merging to 3/2 when the electric field becomes large. A new approach using a computer modelling process for these EHD studies will be presented. Attention will also be given the magnetic field effect observed from the final series of displacement current measurements. A turbulence phenomenon in dielectric liquids has been discovered from a special experiment performed in order to verify the nature of dielectric liquid behaviour under high applied electric field conditions.Dept. of Electrical and Computer Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1995 .R46. Source: Dissertation Abstracts International, Volume: 57-07, Section: B, page: 4614. Adviser: Alan Watson. Thesis (Ph.D.)--University of Windsor (Canada), 1995.