Electrohydrodynamic Phenomena in Discharges over Liquid and Dispersed Electrodes

Data on experiments with discharges over dielectrics in the form of powder of Al 2 O 3 , SiO 2 , soil, etc. are presented. Discharges developed under the upper electrode in the form of a needle or a set of needles. A cuvette filled with a substance was used as the lower electrode, to which grounding was applied. The appearance of jets and their destruction into droplets reflect the development of hydrodynamic phenomena over charged liquids. In the case of a dispersed electrode (electrodes), a funnel (funnels) or complex pointed structures, more complex shapes, etc. appear on the surface under the action of hydrodynamic flows. The surface temperature of the liquid is measured using a thermal imager. A qualitative interpretation of the results is given.