【摘要】 在ANSYS平台上采用有限元法和k ε湍流模型求解粘性不可压缩流体三维雷诺平均的Navier Stokes方程 ,计算在电磁力作用下铝电解槽液体流动。对电解质和铝液的流场分别求解 ,然后利用分层液体界面压强连续条件计算铝液表面变形。2 30kA电解槽的计算结果表明电解质和铝液流动为近似水平的两个旋涡 ,其中一个旋涡的中央区铝液表面上升 ,另一个旋涡中央区铝液表面下降。流动速度从旋涡中心向外增加 ,最大速度发生在电解槽边壁附近 ,并迅速减少为零。这种速度特性表明电解槽边壁某些部分承受较大摩擦力。计算结果与 2 30kA电解槽在运行 5个半月后的实测数据基本一致更多还原

【Abstract】 Using finite element method and k-ε turbulence mo de l, liquid flows and surface distortion of aluminum liquid in a reduction cell ar e calculated based on three-dimensional Reynolds averaged Navier-Stokes equat ion. The calculation is carried out on ANSYS platform. In general, the vertica l flow on interface of two liquid layers is much weaker than the horizontal flow s drived by electro-magnetic forces. Flow fields of molten electrolyte and alum inum liquid are solved separately. The surface distortion of aluminum liquid is calculated from the pressure difference on the liquid interface based on pressur e continuous condition. Numerical example of 230 kA reduction cell is presente d. The numerical results indicate that the horizontal flows approximately consi st of two vortices. The surface rises up in central area of one vortex, the surf ace sets down in central area of another vortex. The flow velocity increases out wards from vortex center. The flow velocity reaches maximum at close to cell wal l and rapidly decreases to zero. The order of magnitude of flow velocity compute d and the interface distortion profile computed are in agreement with measured d ata of 230 kA reduction cell that has been operated for five months.更多还原