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Magnetic fieldsMagnetic fields in large-amperage aluminiumAluminium electrolytic cells can be slowly varying in time due to internal electric current distribution changes, involving the associated full network busbar circuit. The ferromagnetic steel construction elements modify the total magnetic fieldMagnetic fields due to their highly nonlinear magnetisation propertiesProperties. The effects of magnetic and electric field variations are important for MHD stabilityMHD stability and the turbulent large-scale velocityVelocity field. Conventional computational modelling techniques are not well-suited due to the requirement to continuously recompute the full field distribution, coupled with the variation in the free surface shape and the velocityVelocity field. MHDMagneto-Hydro-Dynamic (MHD)-VALDIS software uses an integral equation formulation for the magnetic fieldMagnetic fields, which enables efficient repeated computations of the field distribution over time. This code is used to predict the well-known and new MHD stabilityMHD stability features of commercial cells modified by magnetic fieldMagnetic fields variations, either due to the horizontal liquid metal current fluctuation or modulated booster bar currents.

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Magnetic Fields and Their Variation in Aluminium Reduction Cells

  • 会议论文

  • 发表日期：

    2026年

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  • Valdis Bojarevics

摘要

Magnetic fieldsMagnetic fields in large-amperage aluminiumAluminium electrolytic cells can be slowly varying in time due to internal electric current distribution changes, involving the associated full network busbar circuit. The ferromagnetic steel construction elements modify the total magnetic fieldMagnetic fields due to their highly nonlinear magnetisation propertiesProperties. The effects of magnetic and electric field variations are important for MHD stabilityMHD stability and the turbulent large-scale velocityVelocity field. Conventional computational modelling techniques are not well-suited due to the requirement to continuously recompute the full field distribution, coupled with the variation in the free surface shape and the velocityVelocity field. MHDMagneto-Hydro-Dynamic (MHD)-VALDIS software uses an integral equation formulation for the magnetic fieldMagnetic fields, which enables efficient repeated computations of the field distribution over time. This code is used to predict the well-known and new MHD stabilityMHD stability features of commercial cells modified by magnetic fieldMagnetic fields variations, either due to the horizontal liquid metal current fluctuation or modulated booster bar currents.