NUMERICAL-ANALYSIS OF THE INFLUENCES OF OPERATIONAL PARAMETERS ON THEFLUID-FLOW AND MENISCUS SHAPE IN SLAB CASTER WITH EMBR

A package of computer programs which can calculate fluid flow, induced current, argon gas fraction in molten steel, and meniscus shape was d eveloped and applied to the numerical study on the effect of EMBR. In the numerical analysis of the fluid flow, BFC (Body Fitted Coordinate) was implemented into FVM (Finite Volume Method) to consider complex g eometry of the SEN (Submerged Entry Nozzle) and irregular shape of the meniscus. In investigation about the influence of important operating parameters on the effect of EMBR, several useful standards like the f ollowings were used as evaluation standards: average velocity beneath the meniscus, the shape of the meniscus, and the standard deviation of velocities of each grid plane along the casting direction. In spite o f general stabilizing effect of EMBR, it was found that the molten ste el stream spouted from the SEN makes bypasses to avoid strong magnetic field region under particular conditions: such bypasses act as channe ls and prevent uniform distribution of the flow. A mechanism and condi tions for the formation of them were suggested in the discussion.