Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf

Model experiments with low melting point liquid metals are an important tool to investigate the flow structure and related transport processes in melt flows relevant for metallurgical applications. We present the new experimental facility LIMMCAST for modelling the continuous casting process of steel using the alloy SnBi at temperatures of 200-400°C. The possibilities for flow investigations in tundish, submerged entry nozzle and mould will be discussed. In addition, experimental results will be presented on the impact of a steady magnetic field on the outlet flow from the nozzle, obtained at a smaller-scale set-up working with the room-temperature alloy GaInSn. Local velocities are measured by Ultrasound Doppler Velocimetry and contactless inductive flow tomography. The magnetic field significantly changes the jet-type flow in the mould. Surprisingly, in some parameter ranges the DC field creates low-frequency oscillations of the flow structure which resulted in increased velocity fluctuations. Numerical simulations using the CFX code confirm this magnetic field action.