TIME DEPENDENT ELECTRIC MAGNETIC AND HYD

The study explores the wave dynamics in commercial electrolytic aluminium production cells, particularly focusing on the interactions between electric currents, magnetic fields, and hydrodynamics. The objective is to refine theoretical models that previously assumed uniform current distribution and static magnetic field considerations, which do not accurately represent the complexities of real-world scenarios. A numerical model is developed, incorporating the real-time interaction of electric current with the surrounding busbar network, and accounting for the variability in wave development due to different physical coupling factors. Results indicate that the growth rate of instability is significantly influenced when electric and magnetic fields are continuously updated according to the actual electrical circuit conditions. The findings demonstrate that small amplitude self-sustained interface oscillations are damped by the turbulent viscosity from horizontal circulation velocity fields, and that these circulation vortices contribute to the deformation of the aluminium-electrolyte interface. This research provides examples pertaining to a 500 kA demonstration cell, offering insights into the complexities of the interaction in aluminium electrolysis cells that can enhance operational efficacy.