Numerical simulation of two-phase flow in a casting steel mold

In this work, we will concentrate on the impact of the argon bubbles in the liquid metal concast mould with and without employed static magnetic field. An inhomogeneous Eulerian–Eulerian multi-phase model built-in commercial CFX software was adopted, taking into account the effect of different bubble sizes. The calculations show that argon gas bubbling increases the probability of an asymmetric instability and even unbalances the two-roll flow pattern in the slab mould with increasing mass flow rate of the gas. On the other hand, magnetic fields are an attractive contactless possibility in order to influence the liquid steel flow in the mould of the continuous casting process. For the magnetic field control, a steady magnetic field is applied either over the mould span or just focussed to the nozzle region. The simulations show that the magnetic field primarily damps the local velocities in the mould with complex consequences on the local flow structure.