Influence of conventional and reverse travelling magnetic fields on liquid metal stirring in an asymmetric cavity

P. Oborin¹ - S. Khripchenko^{1, 2} - E. Golbraikh³

¹ Institute of Continuous Media Mechanics, UB RAS, 1 Akad. Korolyov str., Perm, 614013, Russia
² Perm State National Research Polytechnic University, Perm, Russia
³ Physics Department, Ben-Gurion University of the Negev, POB 653, Beer-Sheva 84105, Israel

Abstract
The paper presents results of experimental and numerical studies on liquid metal stirring by a travelling magnetic field (TMF). The aim was to study the TMF effectiveness for stirring impurities into molten metals and to determine an optimal stirring mode. A series of experiments was performed to examine the behaviour of the flow velocity field in an asymmetric cavity with liquid metal under the TMF action. The fluid flow and the distribution of impurities in the melt during stirring is studied numerically in a 2D case. Simulations were performed using the URANS-based Euler-Euler approach and an analytical solution for the electromagnetic body force. This allowed us to analyze the distribution of impurities in the stirred metal for different TMF modes (with a reverse or without it). It has been found that in the case of TMF, whose direction is periodically reversed, the stirring time reduces several times. Tables 1, Figs 11, Refs 19.