FIELD: hydraulics. SUBSTANCE: hydrodynamic friction is reduced due to action of varying electromagnetic field on boundary layer of liquid or gas flowing through passages or externally. Frequency of electromagnetic field is set to be equal to frequency of natural oscillations of liquid molecules or is changed within 109-1013 Hz till hydrodynamic friction is minimum. EFFECT: enhanced efficiency; reduction of power requirements. 3 cl, 1 dwg
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