Abstract
Coupling electromagnetic field, flow field and solidification phenomena, a 3D numerical model was developed to simulate the SWRT82B steel billet by continuous casting with mold (M-EMS) and final electromagnetic stirrings (F-EMS). The columnar region was regarded as a porous media and a generalized approach was used to calculate permeability, while for the equiaxed zone, a variable apparent viscosity model was applied to simulate the fluid flow at the early stage of equiaxed dendrites. The model was validated by the measured data in plant. The simulation results show that the fluid flow pattern near the meniscus with considering solidification is quite different from that without considering solidification. And the maximum stirring velocity of molten steel in M-EMS and F-EMS zone increases with the increase of the current intensity. Moreover, the critical coherency solid fraction determined by the crystal morphology affects the fluid flow in F-EMS zone strongly.
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