Effects of High Electric Fields on Dielectric Liquids of High and Low Viscosity

Abstract

Articles you may be interested inThe effect of an axial electric field on the stability of a rotating dielectric cylindrical liquid bridge When a portion of a liquid dielectric was sUbjected to an electric dc field of hi~h intensity, the level r?se locally. The maximum rise attained by different liquids above the liquid level outside the field mcreased with their dielectric constant and polarizability. , The following observations indicate that electrostriction rather than e:ectr~pho~e~ls was the cause of t~e observed rise in liquid level. (a) Molten polymers, which have such high VISco~ltles that ~Iec~ro~horettc motion of ions or charged particles is virtually suppressed, rose to the same helght~ as flUid hqUids. (b) Neither inverting the direction of the field nor (c) adding 0.05% finely disper~ed alummum.or ~,15% ultramarine powder to molten polyethylene affected the rise in the dc fie~d q~alitatt.vely or quantttattvely, Repulsion occurred in very high fields, producing a slight depreSSIOn In the hqUid level.

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“…Another interesting phenomenon is that of electrostriction of a fluid under the influence of an intense electric field. Tests conducted on various fluids and molten polymers 8 have shown that this effect gives rise to a slight increase in apperent volume of the fluid.…”