Experimental study on the impinging of two opposed inclined electrified laminar jets in the stagnant dielectric medium

This paper presents an experimental study on the liquid column behavior, resulted from impingement of two opposed inclined laminar jets in the presence of high voltage dc electric field. Electric field was generated through two stainless steel capillary nozzles which emit the opposed jets. Distilled water as working fluid of jets and transformer oil as stagnant medium were used in this study. Jets with a collision provide a liquid column which after a short distance its continuity disrupts and droplets is being made. By high speed imaging, the jet column breakup and droplets formation were investigated by observation of surface waves along the column. The effects of applied electric field on the column deviation, its breakup and droplets size formation were analyzed. Results show that increasing of droplets mean diameter and column deviation, but decreasing of droplet formation frequency was obtained by the electric field strength increment. Depend on the wave type on the column surface; twofold breakup behavior will be appearing when the active method of induced electric field of high voltage superimposed.

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► With the applied voltage increment the deviation angle of resulted column increases.
► Depend on the Weber number two wave types could be compose on the column surface.
► Twofold breakup behavior will be appearing when the electric field is superimposed.
► Active method of electric field imposes an additional stability on the impinging section.
► Additional stability on the impinging section slows down the liquid column.