Effect of an Electromagnetic Brake on the Turbulent Melt Flow in a Continuous-Casting Mold

This article presents numerical and experimental investigations with respect to the fluid flow in the continuous-casting process under the influence of an external direct current (DC) magnetic field. Numerical calculations were performed by means of the software package CFX (Ansys, Inc., Canonsburg,...

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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, 2012-08, Vol.43 (4), p.954-972
Main Authors: Miao, Xincheng, Timmel, Klaus, Lucas, Dirk, Ren, Zhongmin, Eckert, Sven, Gerbeth, Gunter
Format: Article
Language:English
Subjects:
Applied sciences
Characterization and Evaluation of Materials
Chemistry and Materials Science
Computational fluid dynamics
Continuous casting
Direct current
Electromagnetics
Exact sciences and technology
Fluid flow
Magnetic fields
Materials Science
Melting
Metallic Materials
Metallurgy
Metals. Metallurgy
Molds
Nanotechnology
Production of metals
Structural Materials
Surfaces and Interfaces
Thin Films
Turbulence
Turbulence models
Turbulent flow
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Summary:This article presents numerical and experimental investigations with respect to the fluid flow in the continuous-casting process under the influence of an external direct current (DC) magnetic field. Numerical calculations were performed by means of the software package CFX (Ansys, Inc., Canonsburg, PA) with an implemented Reynolds-averaged Navier–Stokes (RANS)-SST turbulence model. The nonisotropic nature of the magnetohydrodynamic (MHD) turbulence was taken into account by specific modifications of the turbulence model. The numerical results were validated by flow measurements carried out in a small-scale mockup using the eutectic alloy GaInSn. The jet flow discharging from the submerged entry nozzle was exposed to a level magnetic field spanning across the entire wide side of the mold. The comparison between our numerical calculations and the experimental results displays a good agreement; in particular, we reconstructed the peculiar phenomenon of an excitation of nonsteady, nonisotropic, large-scale flow perturbations caused by the application of the DC magnetic field. Another important result of our study is the feature that the electrical boundary conditions, namely the wall conductivity ratio, have a serious influence on the mold flow while it is exposed to an external magnetic field.
ISSN:1073-5615
1543-1916
DOI:10.1007/s11663-012-9672-0