Numerical Simulation On Coupled Multiphysical Fields In Continuous Casting With Electromagnetic Stirring

Continuous casting mold with electromagnetic stirring can effectively control the process of solidification, improve the solidification structure and the quality of products. So, systematic research the numerical simulation study on coupled electromagnetic field, flow field and heat transfer in continuous casting with eletromagnetic stirring is important to optimize the continuous casting technology.Taking a round billet as the reserch object, in this paper, a electromagnetic field mathematical model was established based on maxwell equation. A three-dimensional mathematical model for flow and temperature field in round billet continuous casting was established based on hydrodymamics and heat transfer. By using the finite element method, the magnetic field in mold was studied. Besides, the effects of tirring parameters on the magnetic field were studied. For the coupled multiphysical fielfd, by using the sequential analysis method as the main method to analyze coupled more physical fields in mold with EMS. The effects of stirring parameters on the distribution of magnetic and flow and temperature field were investigated systematically. finally, According to actual situation, determining the reasonable of stirring parameters. Concrete contents is as follows:The distribution of magnetic induction intensity and the electromanetic were analyzed systematically. With the range of the investigated factor, magnetic induction and electromagnetic force increase with the increase of stirring current.Telectromanetic force increased with the increase of current frequency. There was a big difference between flow field and temperature field in mold with M-EMS and without M-EMS. The phenomenon of double-recirculation in mold becomes more obvious. In addition, the temperature of the forefront of solidification rises, and the location of hot area was high. The flow field and temperature field in mold changed along with the changing of the stirring parameters. The reasonable stirring parameters were determined by the numercial simulation,and the reasonable stirring parameters were 380A、4Hz.