Evaluation of Multiphase Phenomena in Mold Pool under In-mold Electromagnetic Stirring in Steel Continuous Casting
Evaluation of Multiphase Phenomena in Mold Pool under In-mold Electromagnetic Stirring in Steel Continuous Casting
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DOI：
10.2355/isijinternational.41.1245
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发表时间：
2001-10
影响因子：
1.8
通讯作者：
T. Toh;H. Hajime;H. Harada
中科院分区：
文献类型：
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作者：
T. Toh;H. Hajime;H. Harada
通过水银冷态实验和双流体模型数值模拟，探讨了结晶器电磁搅拌在连铸应用中的多相现象。研究结果揭示了浸入式水口中氩气的临界流量，该流量导致结晶器熔池内液态金属的流动形态发生变化。这一变化对电磁搅拌驱动的流动影响不大，因为除了氩气流量较大的情况外，洛仑兹力主要作用在凝固坯壳附近。通过求解近壁区流体流动和粒子跟踪方法，讨论了结晶器内电磁搅拌作用下凝固壳附近的粒子行为，揭示了电磁场通过增大凝固壳附近的速度倾角而产生的提升力的重要作用。
Multiphase phenomena in the application of in-mold electromagnetic stirring in continuous casting were discussed through cold experiment using mercury and numerical simulation by using two fluid model. The result revealed the critical flow rate of argon injected in the submerged entry nozzle, which leads to the change in flow pattern in the bulk liquid metal inside the mold pool. This change does not have a large effect on the flow driven by in-mold electromagnetic stirring because the Lorentz force acts mainly in the vicinity of solidifying shell except for the case of large amount of the argon flow rate. The particle behavior under in-mold electromagnetic stirring in the vicinity of the solidifying shell was also discussed by solving near-wall fluid flow and employing the particle tracking method, which showed the important effect of lift force by the increase in velocity inclination near the solidifying shell by electromagnetic field.