Simulation on Flow Field and Temperature Field of Molten Steel in Bloom Mold with EMS

In order to simulate the flow field and temperature field of molten steel in 360 mm×450 mm bloom continuous casting mold,a 3-D mathematical model was presented.On this basis,the distribution of the flow field and temperature field was analyzed.Numerical simulation results show that the flow direction of molten steel streamed from submerged entry nozzle is changed from vertical downwards to horizontal rotary in effective region of electromagnetic stirring with EMS,and main region of rotary flow is formed.Upper part of molten steel in the effective region is formed into rotary flow from downwards flow of center to upward of solidification surface,then,lower part of molten steel in the effective region is formed into rotary flow from upward part of center to downward of solidification surface.Meanwhile,because of the flow direction changed from vertical downwards to horizontal rotary,the depth of molten steel streamed from submerged entry nozzle becomes shorter,axial temperature becomes lower,radial temperature becomes higher,temperature gradient at solidification surface becomes bigger,and heat transfer becomes more rapidly,which will promote the homogeneous growth of solidifying shell