Modelling of bubble behaviour in aluminium reduction cells Online publication date: Tue, 25-Nov-2014
by Kristian Etienne Einarsrud; Stein Tore Johansen
Progress in Computational Fluid Dynamics, An International Journal (PCFD), Vol. 12, No. 2/3, 2012
Abstract: A phenomenological model for the creation and transport of anodic gas bubbles in aluminium reduction cells is presented. The proposed model is a multiscale approach in which molecular species are produced and transported through a supersaturated electrolyte. Sub-grid bubbles are allowed to form through nucleation and the resulting bubble population evolves through mass transfer and coalescence. As sub-grid bubbles reach a certain size, they are transferred to a macroscopic phase, which evolution is governed by a volume of fluid method. The current work describes the underlying theory and motivation for the proposed model and it is used to describe a laboratory-scale electrolysis cell, showing the potential of the suggested approach. The influence of selected properties of the model is identified by means of a factorial analysis.
Online publication date: Tue, 25-Nov-2014
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