铝电解槽内电-磁-流场的耦合仿真方法及应用

基于电磁流体力学的基本理论,应用等效电阻网络法与有限元相结合计算铝电解槽电流场,标量电位法和双标量磁位法计算铝电解槽磁场,k-ε双方程模型计算电磁力驱动下的铝液流动,并与工业测试结果进行比较.对200 kA侧部四点进电的铝电解槽进行计算与测试,其结果吻合良好;水平磁场形成一个顺时针的漩涡,垂直磁场沿长轴和短轴呈反对分布;铝液流动呈现出沿长轴方向排列的4个漩涡.仿真磁场误差小于10.0%,流场误差不超过5.0%.

Simulation of Coupled Electric-Magnetic-Flow Fields in an Aluminum Reduction Cell

Based on the basic theory of magnetohydrodynamics,the current field in an aluminum reduction cell is calculated using an equivalent resistance method(ERM) and a finite element method(FEM).The magnetic field in alumium reduction cells is calculated using a scalar voltage potential method and a two scalar magnetic potential method.The flow field in aluminum reduction cells is calculated using a two equation k-ε model.A comparison of measured and calculated results in a 200 kA aluminum reduction cell shows good agreement.It is found that the horizontal magnetic field forms a clockwise whirlpool and the vertical magnetic field presents an antisymmetry distribution.The flow field in aluminum reduction cells presents four whirlpools along the X axis.The errors of the magnetic field and the flow field are less than 10.0% and 5.0%,respectively.