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Numerical simulation of electromagnetic levitation in a cold crucible furnace
S. Spitans1, 2 - E. Baake1 - A. Jakoviċs2 - H. Franz3
1 Institute of Electrotechnology, Leibniz University of Hannover, Wilhelm-Busch-Str. 4, 30167 Hannover, Germany
2 Laboratory for Mathematical Modelling of Environmental and Technological Processes, University of Latvia, 8 Zellu str., LV-1002 Riga, Latvia
3 ALD Vacuum Technologies GmbH, Wilhelm-Rohn Str. 35, 63450 Hanau, Germany
Abstract
Guidelines for a cold crucible (CC) levitation melting furnace design have been examined in the literature and combined for a pilot CC concept. Meanwhile, by means of external coupling between electromagnetic and hydrodynamic problems a numerical model for liquid metal flow with free surface dynamics in an alternating EM field has been developed and verified. A 3D model with Large Eddy Simulation (LES) turbulence description is applied for a case of 1 kg of liquid titanium levitation in the CC furnace at two different AC frequencies. Calculation results are compared to a simplified model of the furnace section with the k-ω SST turbulence approximation. Tables 1, Figs 9, Refs 12.