Аннотация:Data on experiments with discharges over dielectrics in the form of powder of Al2O3, SiO2, 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 devel-opment of hydrodynamic phenomena over charged liquids. In the case of a dispersedelectrode (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 liq-uid is measured using a thermal imager. A qualitative interpretation of the results is given.