磁场对液态金属流的制动效应

BRAKING EFFECT OF A STATIC MAGNETIC FIELD ON LIQUID METAL FLOW IN A SLAB MOLD

研究在静磁场作用下；连铸坯中液态金属的流动，建立了二维数学模型并考虑了湍流的影响．采用数值分析方法分析了磁场对液态金属流股的制动效应．计算结果说明静磁场可以有效地减小流股速度并使其分散，同时使上升到液态金属液面的反转流减弱．随着哈特曼数增高和雷诺数的减小，磁场的制动效应增强．

Mathematical model on two-dimensional liquid metal flow in a casting slab mold under a static magnetic field is presented, and the effect of the static magnetic field on the liquid metal flow is studied by means of numerical analysis. Computational results show that the velocity of the strand of liquid metal flow and the strength of the reverse flow to the meniscus are reduced by the static magnetic field, and that the braking effect of the magnetic field on the strand of liquid metal flow becomes stronger with the increasing of Hartmann number or the decreasing of Reynolds number.