Generation of Reverse Meniscus Flow by Applying An Electromagnetic Brake

Abstract A numerical study is presented that deals with the flow in mold of a continuous slab caster under influence DC magnetic field (electromagnetic brakes (EMBrs)). The arrangement and geometry investigated here based on series previous experimental studies carried out at mini-LIMMCAST facility Helmholtz-Zentrum Dresden-Rossendorf (HZDR). models ruler-type EMBr installed region ports submerged entry nozzle (SEN). current article considers magnet strengths up to 441 mT, corresponding Hartmann number about 600, takes electrical conductivity solidified shell into account. model turbulent applied implemented using open-source CFD package OpenFOAM®. Our results reveal growing magnitude may cause reversal direction meniscus surface, which related formation “multiroll” pattern mold. This phenomenon can be explained as classical magnetohydrodynamics (MHD) effect: (1) closure induced electric not primarily braking Lorentz force inside jet but an acceleration regions previously weak velocities, initiates opposite vortex (OV) close mean jet; (2) this develops size expense main until it reaches where becomes clearly visible. We also show must expected when smaller than critical value. due transfer kinetic energy from structures flow. further increase intensity leads damping and, consequently, reduction upper roll. These investigations cannot reduced simple effect; depending strength, its action found topologically complex.