Numerical Calculation of the Electromagnetic Expulsive Force upon Nonmetallic Inclusions in an Aluminum Melt: Part II. Cylindrical Particles

Insulating cylindrical obstacles of three configurations were studied by the numerical methods described in part I of this article, and the calculations mainly concentrated on the effect of the ends of a finitely long cylinder on the induced fluid flow as well as the electromagnetic expulsive force. Comparisons between the numerical results based on the theory for an infinitely long cylinder and the experimental data reported by others were made. It was found that induced three-dimensional flow appears in all three cases due to the rotational force field, and the flow pattern is the same as that of a spherical particle. The different extents of deformation of the electric streamlines by the side faces and the circular end faces of the cylinder contribute to the variation of the intensity of the induced fluid flow and the electromagnetic expulsive force for each case. Among the three cases studied, the disposition of highly elongated cylinders for case 2, in which the axis is parallel to the direction of the magnetic field, is unfavorable to their repulsion from a molten metal.