Electromag-netic casting (modeling of heat transport and surface in-stability)

J. W. Evans - D. Prasso - D. Gupta - R. Kageyama

Department of Materials Science and Mineral Engineering, University of California, Berkeley CA 94720, USA

Abstract
Two aspects of electromagnetic casting that have received little attention in previous work are heat transport and the stability of the metal free surface. The first aspect has been examined in a collaborative investigation with Reynolds Metals Co.; extensive thermocouple measurements provided a means for validating a mathematical model developed at Berkeley. The second aspect has been examined by linear perturbation analysis and by numerical simulation of the surface behaviour. Results suggest that the surface of aluminum would be unstable beyond a critical magnetic field (approx. 0.05 Tesla). Figs. 4, refs. 16.