CFD analysis of the trajectory of inclusions in mould of continuous steel casters
by J.M. Khodadadi, X.K. Lan
Progress in Computational Fluid Dynamics, An International Journal (PCFD), Vol. 4, No. 1, 2004

Abstract: A computational investigation of the trajectory of inclusions in the mould of continuous steel casters is presented. The equation of motion for particles experiencing body, buoyancy, drag and added-mass forces is solved. The flow field information is supplied from computation of two-dimensional turbulent fluid flow, heat transfer and solidification in the mould. The computations are based on an iterative, finite-volume numerical procedure using primitive dependent variables, whereby the governing time-dependent continuity, momentum and energy equations in combination with a low-Reynolds number turbulence model are solved. A single-domain enthalpy formulation is used for simulation of the phase change phenomenon. Darcy’s Law-type porous media treatment is utilised to account for the effect of phase change on convection. The trajectory of alumina inclusions having diameters of 0.3–0.6 mm show that larger particles tend to rise and float to the surface, whereas the smaller particles generally follow the flow and end up in the cast material. The effect of the casting speed on the trajectories of inclusions is discussed. In addition, the time-history of the added-mass and drag forces are elucidated.

Online publication date: Wed, 24-Dec-2003

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