Modeling the dynamics of magnetic semilevitation melting

In semilevitation melting, a cylindrical metal ingot is melted by a coaxial a.c. induction coil. A water-cooled solid base supports the ingot, while the top and side free surface is confined by the magnetic forces as the melting front progresses. The dynamic interplay between gravity, hydrodynamic s...

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Bibliographic Details
Published in:Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2000-02, Vol.31 (1), p.179-189
Main Authors: BOJAREVICS, V, PERICLEOUS, K, CROSS, M
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Metallurgical fundamentals
Metals. Metallurgy
Production of metals
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Summary:In semilevitation melting, a cylindrical metal ingot is melted by a coaxial a.c. induction coil. A water-cooled solid base supports the ingot, while the top and side free surface is confined by the magnetic forces as the melting front progresses. The dynamic interplay between gravity, hydrodynamic stress, and the Lorentz force in the fluid determines the instantaneous free surface shape. The coupled nonstationary equations for turbulent flow, heat with phase change, and high-frequency electromagnetic field are solved numerically for the axisymmetric time-dependent domain by a continuous mesh transformation, using a pseudospectral method. Results are obtained for the two actually existing coil configurations and several validation cases.
ISSN:1073-5615
1543-1916
DOI:10.1007/s11663-000-0143-7