关键词:  标准k- ε湍流模型,  电磁制动 ,  结晶器 ,  流场 , 板坯连铸

Abstract:

Using mercury as working medium in the earlier study, physical simulation was intended to investigate the liquid flow in a mold of slab in continuous casting with electromagnetic braking (EMBr). From the restrictions on the size and quantity of the sensors, the result of mercury model was limited to analysis in a two-dimensional flow field. Based on the previous physical simulation, a three-dimensional flow was simulated numerically with a standard k-ε turbulence model to investigate influences of the magnetic field intensity, and distribution on the metal flow in the mold of slab in continuous casting with and without EMBr. Simulation results were compared with the physical results. It was found that the simulation could reveal more detailed phenomena and flow behaviors. These could not be observed in physical simulation as restricted by the quantity of sensors. The results indicated that a flow field in a crystallizer had a complex three-dimensional flow field characteristic with a flow control mold (FC Mold) EMBr mode. More attention must be paid to mold slow liquid level caused by surface inclusions, transverse crack and other factors. Appropriate and effective EMBr should match the continuous casting process.

Key words: mold ,  electromagnetic braking (EMBr) ,  flow ,  standard k-ε turbulence model, continuous casting of slab