连铸过程中电磁流体力学的数值模拟现状及发展趋势

对连铸过程中电磁流体力学的数值模拟的研究现状进行了综合评述。介绍了一种应用于连铸过程中的低频电磁流体力学数值模拟的新方法，并给出了其在圆坯旋转搅拌、CSP薄板坯电磁制动和板坯二冷辊式行波搅拌中的应用实例。该方法特点是分别建立电磁场模型和流场模型，并采用磁感应方程实现电磁场和流场模型之间的耦合。结果表明，目前的方法可较为准确地描述连铸过程中的电磁场分布和电磁流体力学特点，并能够对电磁搅拌参数和连铸工艺过程进行优化。最后，提出了连铸过程中电磁流体力学数值模拟技术的未来发展趋势。

State of the art of numerical simulation of magneto-hydro dynamics in the continuous casting process

In this paper, the state of the art of numerical simulation of magneto-hydro dynamics (MHD) in the continuous casting (CC) process is reviewed. A new numerical approach for solving the low-frequency MHD is introduced and its applications in the In-mold rotary electromagnetic stirring for a bloom caster, the electromagnetic braking for a CSP thin slab caster and the In-roll type S-EMS for a slab caster are given. The mathematical approach includes an electromagnetic model and a flow analysis model. The magnetic induction equation is used to account for the coupling between the flow model and the magnetic field model. The results show that the proposed approach can be used to describe the three-dimensional electromagnetic field distribution and the electromagnetically driven flow characteristics in the CC process and optimize the stirring and operation parameters. Finally, the future tendency of numerical simulation of magneto-hydro dynamics in the continuous casting process is suggested.