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Effect of magnetic forces on bubble transport and MHD stability of aluminium electrolysis cells

Effect of magnetic forces on bubble transport and MHD stability of aluminium electrolysis cells
Effect of magnetic forces on bubble transport and MHD stability of aluminium electrolysis cells
The effect of electro-magneto-phoretic force on gas bubbles due to the additional magnetic pressure distribution in the electrolyte is analysed and a mathematical model is derived. According to the results, the integral force on an individual bubble is of similar order as the typical drag force associated with the electrolyte flow, opposing the motion of the bubbles along the slightly inclined base of the anode. This could explain certain features of the anode effect onset. It is demonstrated that the presence of electrolyte channels, where the bubbles escape, has a crucial effect on the shape and size of the metal bath interface deformation. A shallow layer flow model accounting for the channels is derived. Results on the interface stationary shape and MHD wave stability are presented.
0024-998X
125-136
Bojarevics, Valdis
1fc203a6-526f-478d-b26f-4da4474c06db
Roy, Alan
a396020d-d7f4-4678-bd31-72a2642b7702
Bojarevics, Valdis
1fc203a6-526f-478d-b26f-4da4474c06db
Roy, Alan
a396020d-d7f4-4678-bd31-72a2642b7702

Bojarevics, Valdis and Roy, Alan (2012) Effect of magnetic forces on bubble transport and MHD stability of aluminium electrolysis cells. Magnetohydrodynamics, 48 (1), 125-136.

Record type: Article

Abstract

The effect of electro-magneto-phoretic force on gas bubbles due to the additional magnetic pressure distribution in the electrolyte is analysed and a mathematical model is derived. According to the results, the integral force on an individual bubble is of similar order as the typical drag force associated with the electrolyte flow, opposing the motion of the bubbles along the slightly inclined base of the anode. This could explain certain features of the anode effect onset. It is demonstrated that the presence of electrolyte channels, where the bubbles escape, has a crucial effect on the shape and size of the metal bath interface deformation. A shallow layer flow model accounting for the channels is derived. Results on the interface stationary shape and MHD wave stability are presented.

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More information

Published date: 2012
Organisations: Electronics & Computer Science

Identifiers

Local EPrints ID: 346533
URI: http://eprints.soton.ac.uk/id/eprint/346533
ISSN: 0024-998X
PURE UUID: 868fb0d8-f352-48a3-a07e-f94ee63798a0

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Date deposited: 03 Jan 2013 10:04
Last modified: 08 Jan 2022 00:16

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Contributors

Author: Valdis Bojarevics
Author: Alan Roy

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