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Time dependent electric, magnetic and hydrodynamic interaction in aluminium electrolysis cells

Time dependent electric, magnetic and hydrodynamic interaction in aluminium electrolysis cells

Bojarevics, Valdis and Pericleous, Koulis ORCID: 0000-0002-7426-9999 (2006) Time dependent electric, magnetic and hydrodynamic interaction in aluminium electrolysis cells. In: Fifth International Conference on CFD in the Process Industries [Proceedings]. CFD Online. ISBN 0643094237

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Abstract

The waves in commercial cells for electrolytic aluminium production originate at the interface between the liquid aluminium and electrolyte, but their effect can spread into the surrounding busbar network as electric current perturbation, and the total magnetic field acquires a time dependent component. The presented model for the wave development accounts for the nonuniform electric current distribution at the cathode and the whole network of the surrounding busbars. The magnetic field is computed for the continuous current in the fluid zones, all busbars and the ferromagnetic construction elements. When the electric current and the associated magnetic field are computed according to the actual electrical circuit and updated for all times, the instability growth rate is significantly affected. The presented numerical model for the wave and electromagnetic interaction demonstrates how different physical coupling factors are affecting the wave development in the electrolysis cells. These small amplitude self-sustained interface oscillations are damped in the presence of intense turbulent viscosity created by the horizontal circulation velocity field. Additionally, the horizontal circulation vortices create a pressure gradient contributing to the deformation of the interface. Instructive examples for the 500 kA demonstration cell are presented.

Item Type: Conference Proceedings
Title of Proceedings: Fifth International Conference on CFD in the Process Industries [Proceedings]
Additional Information: [1] This paper was first presented at the 5th International Conference on CFD in the Process Industries(Computational Fluid Dynamics) held from 13-15 December 2006 in Melbourne, Australia. [2] ISBN: 0643094237 (CD-ROM ).
Uncontrolled Keywords: computational fluid dynamics, CFD, magnetohydrodynamics, MHD
Subjects: Q Science > QA Mathematics > QA76 Computer software
Q Science > QC Physics
T Technology > TN Mining engineering. Metallurgy
Pre-2014 Departments: School of Computing & Mathematical Sciences
School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis
School of Computing & Mathematical Sciences > Centre for Numerical Modelling & Process Analysis > Computational Science & Engineering Group
School of Computing & Mathematical Sciences > Department of Computer Systems Technology
School of Computing & Mathematical Sciences > Department of Mathematical Sciences
Related URLs:
Last Modified: 14 Oct 2016 09:02
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/1034

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