Use of rotating-field method for measuring electrical conductivity of melts

V. V. Voronkov - I. I. Ivanova - B. M. Turovskii

Abstract
An estimate of the Hartmann number shows that in a number of cases in us ing the method of the rotating magnetic field for the measurement of the electrical conductivity of melts, it is necessary to consider the hydrodynamic motion of the melt inside the crucible under the action of the field. A computational formula is derived from the moment of forces acting on the crucible with the liquid metal, taking into consideration the motion of the melt in the magnetic field and indicating the need for considering the viscosity of the melted metal in measuring the electrical conductivity by this method. A quantitative criterion is given for disregarding the self-induction effect.