PONDEROMOTIVE FORCES IN LIQUID CONDUCTORS WITH MACROSCOPIC SOLID INCLUSIONS

This work studies the ponderomotive forces occurring in liquid conduct ors with macroscopic inclusions. It is shown that if the electric cond uctivity of inclusions is higher than the electric conductivity of the host medium then the inclusions are attracted to the axis of a conduc tor. In the opposite case the ponderomotive forces repel the inclusion s towards the surface of a conductor. It is shown that if a certain re lation between an amplitude and a frequency of an electric current is satisfied, the parametric resonance in the oscillations of the inclusi ons with electric conductivity higher than that in the bulk of the con ductor can occur. The moments of the ponderomotive forces exerted on a particle of a nonspherical shape are determined. It is shown that the direction of the moment of a ponderomotive force alternates depending upon the sign of the difference between the electric conductivity of an inclusion and of the host medium.