Experimental and numerical modeling of the steel flow in a continuous casting mould under the influence of a transverse DC magnetic field

K. Timmel - X. Miao - S. Eckert - D. Lucas - G. Gerbeth

Forschungszentrum Dresden-Rossendorf, P.O.Box 510119, 01314 Dresden, Germany

Abstract
This paper is concerned with numerical and experimental investigations focusing on the fluid flow in the continuous casting process under the influence of an external DC magnetic field. Systematic measurements of the mould flow were carried out using the eutectic alloy GaInSn inside a plexiglass model at room temperature. The jet flow discharging from the submerged entry nozzle was exposed to a level magnetic field spanning across the entire wide side of the mould. Ultrasound Doppler velocimetry (UDV) was applied to obtain a detailed experimental data base with respect to the mean values and transient properties of the velocity fields occurring in the mould. Numerical calculations were performed by means of the software package CFX with an implemented RANS-SST turbulence model. The comparison between our numerical calculations and the experimental results displays a very well agreement. An important outcome of this study is the feature that the magnetic field does not provide a smooth reduction of the velocity fluctuations at the nozzle outlet. Figs 8, Refs 23