Influences of Electric Conductivity and Charging Voltage on Electric-Induced Motion in Mineral Oil after Change of Electrode Polarity

Abstract

This paper describes the results of an investigation of the electric field-induced motion in mineral oils between stainless steel electrodes after change of electrode polarity.
We have observed time dependence of current and schlieren images of the motion by using mineral oils of electric conductivity ranging from 4.5×10^-14S/m to 1.7×10^-12 S/m at the charging voltage equal to ±8kV and by charging voltage ranging from ±1kV to ±10kV at the conductivity equal to 9.0×10^-14S/m. The results are as follows: (1) An increase time of current and a time of peak current shorten with the increase of electric conductivity and electric field intensity. (2) The motion occurs with a time delay after change of electrode polarity and produces a peaked behavior in the current waveform. (3) These time are inversely proportional to the electric field intensity and the quantity of charge carriers drifting between electrodes from the increase time of current to the time of peak current. (4) The experimental results are well explained by established model.