Numerical simulation of the electromagnetic stirrer adapted by using magnetodielectric composite

K. Bolotin - I. Smolyanov - E. Shvydkiy - V. Frizen - S. Bychkov

Ural Power Engineering Institute, Ural Federal University, 620002, 19 Mira str, Yekaterinburg, Russia

Abstract
The paper presents the results of a study on the possibility to use Fe-Al₂O₃-based cermet composite as a magnetodielectric insert to compensate the working gap between the inductor and the melt in the bottom electromagnetic stirrer with a rotating magnetic field. A 3D model of the adapted laboratory facility for a composite with an iron mass fraction of 70% was studied. Previously measured electrical, thermal and magnetic physical parameters of the composites were used in the model. The problems of heat distribution in the adapted lining and the coupled electromagnetic-hydrodynamic-thermal problem of temperature equalization in molten metal stirring were numerically modelled. A comparison of the results obtained for the standard and for the adapted stirrer has shown that the composite inserts can be used to decrease the temperature equalization time more than twice, whereas the thermal effect decreases by more than 1.1 times. Tables 2, Figs 7, Refs 10.