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本文建立了电解质-气泡两相流模型和氧化铝扩散模型,全面考虑了气泡、电磁力以及铝液流动等三个因素,计算分析了稳态电解质流动场和瞬态氧化铝浓度场。主要结果如下:将铝液流动引入计算十分必要,否则会弱化电解质漩涡流动状态,削弱氧化铝的整槽扩散速度;新概念母线可使电解质流动的两个漩涡对称性更加明显、流速分布更为均匀,进而使氧化铝浓度分布更加均匀。测量结果与模拟结果所揭示的氧化铝浓度分布规律相吻合。
In this paper, the two-phase electrolyte-bubble model and the alumina diffusion model were established. The bubble, electromagnetic force and flow of molten aluminum were all considered. The steady-state electrolyte flow field and transient alumina concentration field were calculated and analyzed. The main results are as follows: It is necessary to introduce the flow of molten aluminum into the calculation, otherwise it will weaken the flow state of the electrolyte vortex and weaken the diffusion speed of alumina. The new concept busbar makes the symmetry of the two vortexes of the electrolyte more obvious and the flow velocity distribution more Uniform, and then make the alumina concentration distribution more uniform. The measured results agree well with the alumina concentration distribution revealed by the simulation results.