Oscillation of Confined Jets in Continuous Casting Mold Flow

Abstract

In continuous slab casting, the liquid steel is introduced into the mould via a submergered entry nozzle. This nozzle usually has two opposed orifices on its side walls, generating two diametrically opposed turbulent jets that are declined about 20° to the horizontal axis. These jets interact with the surrounding walls of the mould, which leads to an unstable flow situation and a self induced oscillation of the jets. Although both mould and nozzle geometry have two perpendicular symmetry planes, the oscillations are asymmetric. The fluid flow inside the mold is calculated with a 3D finite volume solver using turbulence models based on Reynolds‐averaging. The massflow of the jets and the mould extensions are varied, and the numerical results are partially compared with PIV‐measurements at a 1:1 scaled watermodel of the mould. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Flow Modelling in Continuous Casting of Round Bloom Strands with Electromagnetic Stirring

“…The shape of the liquid domain inside the solidified strand is approximated via the square root law for the growth of the shell thickness [22][23][24][25][26][27]. No symmetry conditions are utilized in the geometry in order to resolve possible asymmetrical flow fluctuations [27,28]. The solidification fronts are modelled as moving walls, source terms in the wall adjacent cells consider the loss of mass, momentum, energy, turbulence quantities and inclusions due to solidification.…”