Abstract
Using correlation technique concerning with binary digital tracer images measurements of electrically operated flow fields in insulating oil have been perfomed. The insulating oil, which is polydimethylsiloxane silicon oil of 50 cSt viscosity, starts flowing soon as it is subjected to strong electric fields generated by dc high-voltage. The electrode arrangement used for the measurements of fluid flow is a pair of rod - plane electrode system in which the rod becomes a high-voltage electrode. Experimental results of the measurements show that the fluid flow near the high-voltage electrode accelerates with dependent on an electrostatic force as the applied voltage is increased. The fluid flow also has the electrical effect that the velocity of fluid flow near the high-voltage electrode at negative polarity is larger than that of positive polarity. In addition, the rising phenomenon of fluid along the electrode appears at only positive polarity. Finally, it is concluded from the experimental results that the fluid flow originates in a dynamical influence based on the repulsive electrostatic force which electrically operates on the space charges of same sign as the high-voltage electrode polarity.
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