On the calculation of the electromagnetic force field in the circular stirring of metallic melts

Abstract

A mathematical representation has been developed to represent the electromagnetic force field used to impart rotary motion to a cylindrically shaped molten metal pool. Problems of this type arise in the electromagnetic stirring of continuous casting systems. The formulation given here introduces two new facets which have been neglected by previous investigations, namely, an allowance for the nonlinear dependence of the magnetic flux intensity on the radial distance, and the coupling between the melt velocity and the induced field. It is shown that neglecting these factors may involve errors in the 20%–50% range.