Abstract

´This paper presents the application of a three-dimensional finite element solution algorithm for the prediction of velocity and temperature fields in an industrial continuous galvanizing bath. The effect of line speed, strip width, strip temperature and inductor mixing was evaluated. Simulations were carried out using a parallel CFD software developed at IMI-NRC. The incompressible Navier-Stokes equations have been solved for turbulent flows using the k ǫ model. The segregated solution algorithm solves separately the momentum-continuity, energy and turbulence equations. Both forced convection and temperature dependent density conditions were considered in order to assess the buoyancy effect. When considering the buoyancy, the flow induced by variations in density is especially apparent near the inductors and the melting make up ingot, while little effect is observed in the sheet and rollers region. Thermal effects are also amplified when the inductor is at high capacity, during the ingot melting. Simulations allow visualization of regions of varying velocity fields and clearly illustrate the mixed and stagnant zones for different operating conditions, thus helping operators to understand the flow behavior for this complex process.

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