Jet and drops formation in electrohydrodynamic spraying of liquids. A systematic approach

The surface of the liquid issuing from a capillary subjected to the electric stresses deforms to an elongated jet which disrupts to a series of droplets. In the paper the detailed experimental studies of jet and drop formation from liquid issuing from a capillary maintained at high voltage of positive or negative polarity have been reported. The forms of the jet and the way it disrupts into droplets have been classified into the modes of spraying. A definition of the mode of spraying and the criteria for the mode classification, based on the geometrical form of the meniscus, jet or drop formation are given.