Numerical and Experimental Analysis of Flow Phenomenon in Centrifugal Flow Tundish

Abstract

Fluid flow phenomenon in Centrifugal Flow (CF) tundish is investigated using water modeling and numerical simulation techniques. The effect of the dam spacing and rotation speed on the flow structure has been analyzed in detail. Results reveal that the bias flow, originating from the rotary outflow, leads to the formation of transversal circulation behind the dam. Such transversal flow can effectively diminish the conventional dead volume. Meanwhile, small dam spacing helps to produce a large-scale transversal circulation, and thus the prolonged flow path and relatively low velocity results in an increased plug volume. With the increase of dam spacing, the intensity of transversal circulation decreases and the increased fluid velocity causes a minished plug volume. The highest ratio of plug to dead volume is obtained under the dam spacing when transversal circulation is strongest. Furthermore, under lower magnetic intensities, the weaker fluid momentum leads to relatively large dead volume. With the increasing of magnetic intensity, the fluid mixing becomes better. However, much larger magnetic intensity will lead to decreased ratio of plug to dead volume. Therefore, a medium rotation speed (around 30 r/min) should be recommended.

Modeling of a Thermo-Electromagneto-Hydrodynamic Problem in Continuous Casting Tundish with Channel Type Induction Heating

“…Thirdly, the transient flow field and the temperature distribution of molten steel in tundish with induction heating are computed by adding the joule heating to energy conservation equation and the electromagnetic force to momentum conservation equation for molten steel as the source terms. 35,36) The governing equations of electromagnetic field and other physical fields are solved by employing the commercial software ANSYS and CFX, respectively. As for the electromagnetic field calculation based on ANSYS, the finite element method is used.…”

Large Eddy Simulation on Flow Structure in a Dissipative Ladle Shroud and a Tundish

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Liquid phase separation and microstructure characterization in a designed Al-based amorphous matrix composite with spherical crystalline particles

“…The progress in the solidification control has been made to obtain the refinement microstructure. The effects of the magnetic field [7], the convective flow [8], the gravity level [9] and the droplet interaction with the solidification interface [10] on the solidification process were investigated recently. It was indicated that the microstructure evolution is strongly dependent on the thermodynamics and kinetics of the liquid phase separation in the miscibility gap.…”