Numerical study of a continuous casting process with electromagnetic brake

• Main Author: Miao, Xincheng
• Other Authors: TU Bergakademie Freiberg,
• Format: Doctoral Thesis
• Language: English
• Published: Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola" 2014
• Subjects: Stranggießen; Elektromagnetische Bremsen; Numerische Simulation; MHD Turbulenz-Modell; Continuous casting; Numerical simulation; Electromagnetic brake; MHD turbulence model; ddc:620; Elektrische Bremse; Magnetfeld; Turbulenz; Strangguss; Magnethydrodynamik
• Online Access: http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-144798; http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-144798; http://www.qucosa.de/fileadmin/data/qucosa/documents/14479/thesis%28hr%29_miao.pdf

This dissertation investigates the effect of electromagnetic braking and gas injection on the fluid flow in a continuous casting slab mold numerically and makes verifications on basis of a small Liquid Metal Model for Continuous Casting of steel (mini-LIMMCAST). Numerical calculations were performed by means of the software package CFX with an implemented RANS-SST turbulence model. The non-isotropic nature of the MHD turbulence was taken into account by specific modifications of the turbulence model. The numerical results were validated by flow measurements at the mini-LIMMCAST facility. Numerical simulations disclose the damping effect on the flow closely depending on the wall conductance ratio. In addition, specific modifications of the turbulence model play a crucial role in reconstructing the peculiar phenomenon of an excitation of nonsteady, nonisotropic, large-scale flow perturbations caused by the application of the DC magnetic field.