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The article presents the results of measurements and analysis of the flow electrification process. The research is presented with a new type of measurement instrument, in which one of the electrodes moves in an oscillating manner. The arrangement comprises two parallel plates and the liquid is relocated in one dimension. One of the electrodes is in the form of a copper wire. As a result, the liquid...
Past studies of the electrically modified forced flow through a cell with a wire two plate electrode geometry modelling the injection zone of an E.H.D. generator showed the existence of two flow regimes. We present here some more refined results based on velocity measurements by L.D.A‥ For both regimes, the velocity profiles allow us to explain how the injected space charge modifies the flow and how,...
The stationary current-voltage characteristics in a blade-plane set-up generally exhibit two main regimes of electrical conduction, a quasi-ohmic regime and one of rapid increase. The latter regime corresponds to dominance of charge injection by the blade associated with a vigourous liquid motion which contributes to the passage of the current. The theoretical study of bulk conduction in a wire-cylinder...
In 1836, Faraday noted that turpentine would rise along high voltage leads; in 1926 Gyemant studied the rise of oil and found it was proportional to the square of the applied voltage. The effects then received little attention until 1955 when Sumoto again called attention to them. A historical survey has been given by Pickard.1
Since Coelho and Bono1 published their interesting results on conduction in n-hexane and n-heptane under highly non-uniform fields, no further work has been reported in connection with their findings. In the following, some new experimental results along this line are presented.
The dielectrophoretic attraction of matter into the regions of highest field strength when a non-uniform electric is present has been utilized in the separation of solid materials of differing dielectric constants and again in the extraction of solid particles from suspension in liquids.1–4 The present study was designed to explore the effects upon dc conduction through dielectric liquids when solid...
The current-voltage d.c, characteristics of several saturated acyclic hydrocarbons (n-C5H12, n-C6H14 and n-C6H16) have been studied in a coaxial electrode arrangement previously described and providing a high field-gradient between the inner (thin wire) and the outer electrode. The liquids were tested after various stages of purification, and under both polarities of the cell. Before any measurement...
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