Numerical Simulation On Electromagnetic Field And Flow Field In Continuous Casting With Mold Electromagnetic Stirring Of Round Billet

Continuous casting with mold electromagnetic stirring can effectively control the flow of the molten steel,heat transfer and the process of solidification,in order to improve the purity of products,expand equiaxial crystal area,reduce segregation,greatly reduce center loose and shrinkage.In this way,high-quality steel can be produced.Therefore,it is important to systematic research the numerical simulation on electromagnetic field and flow field in continuous casting with M-EMS,which can improve quality of the billet and optimize the continuous casting technology.In this paper,taking a round billet in the curved mold with two-side immersed nozzle as the research object,making simplification according to the actual situation,an electromagnetic field mathematical model was established based on maxwell equations.The numerical simulation was analyzed by the the finite element method in ANSYS Electromagnetic Model.The effects of the different current value of coils,thickness of the mold on the behavior of electromagnetic field are discussed.Based on classical hydrodynamics equations,taking turbulence model with low Reynolds number,A three-dimensional mathematical model for flow field in round billet continuous casting was established,which utilized the sequential coupling method,and taked time-mean value of the electromagnetic force as the exterior workload.The flow field was analyzed by the finite volume method with CFX.Through the comparison for the characters of the flow field in the different situation,choose the reasonable stirring parameters for the M-EMS.Concrete conclusion is as follows:The distribution of magnetic induction intensity and the electromagnetic force were analyzed systematically in this paper.With the range of the investigated factor,magnetic induction and electromagnetic force increase with the increase of current intensity.As the increase of current frequency,electromagnetic force increase and magnetic induction would decay.With M-EMS,the phenomenon of double-recirculation in mold became more obvious.After analyzing the numerical simulation,the reasonable stirring parameters were determined as I= 200 A,f=3Hz.