Numerical Simulation Of Magnetic Flow Coupling And Optimization Of Process Parameters For Multi-mode Electromagnetic Stirrer

The application of electromagnetic stirring(EMS)technology is one of the most important contributions of continuous casting technology.Electromagnetic stirring is the result of the interaction between the induced current and the local area.Electromagnetic stirring technology considers the electromagnetic stirrer and billet as a whole.Its classification must also involve the installation position of the electromagnetic stirrer itself and the stirrer associated with the billet and the flow pattern of the molten steel in the billet.In this paper,a multi-mode magnetic crucible electromagnetic stirrer is selected.The electromagnetic stirrer is developed jointly by the Research Institute and the electromagnetic equipment manufacturer according to the research and experimental requirements of scientific research institutions.In this paper,the multi-mode magnetic field crucible electromagnetic stirrer is taken as the research object.The numerical analysis model of electromagnetic field of the electromagnetic stirrer is established by Ansoft Maxwell software,and the distribution rule of electromagnetic field in the crucible and the influence of process parameters on the electromagnetic field are obtained.Under the action of electromagnetic stirring of various magnetic fields,the distribution of magnetic fields has its own characteristics,which can produce corresponding metallurgical effects on different types of billets.By changing the process parameters of electromagnetic stirring,the size and shape of magnetic field can be adjusted.The flow field calculation model of crucible and molten metal in electromagnetic stirrer is established by FLUENT software.The magnetic induction intensity in X,Y and Z directions and the position information of each node are derived from the electromagnetic field simulation results.The MAG format magnetic field file is transformed by MATLAB program.The file type can be used for MHD(magnetohydrodynamics)interface in fluent to load specific magnetic field for fluid The flow field distribution and the influence of process parameters on the flow field were obtained.Through the numerical simulation of the flow field of the fluid in the crucible during the electromagnetic stirring process,the influence of various magnetic fields on the flow of the molten metal is reflected.Combined with the results of the numerical simulation of the magnetic field,the relationship between the change of the process parameters and the distribution of the fluid movement is comprehensively obtained.According to the results of numerical simulation analysis,we get the range of reasonable process parameters.Through the multi-mode magnetic field crucible electromagnetic stirring experiment platform in the laboratory,we carry out the material test,and further carry out the comparative optimization experiment on the process parameters.