Tracking single bubble in Hall-Héroult aluminium cell : an experimental and numerical study

Das, Subrat, Littlefair, Guy, Morsi, Yos and Brooks, Geoffrey 2012, Tracking single bubble in Hall-Héroult aluminium cell : an experimental and numerical study, in ISTEC 2012 : Proceedings of the 3rd International Science & Technology Conference, ISTEC, [Dubai, UAE], pp. 1290-1298.

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Title Tracking single bubble in Hall-Héroult aluminium cell : an experimental and numerical study
Author(s) Das, Subrat
Littlefair, Guy
Morsi, Yos
Brooks, Geoffrey
Conference name International Science & Technology. Conference (3rd : 2012 : Dubai, United Arab Emirates)
Conference location Dubai, United Arab Emirates
Conference dates 13-15 Dec. 2012
Title of proceedings ISTEC 2012 : Proceedings of the 3rd International Science & Technology Conference
Editor(s) Isman, Aytekin
Dundar, Sahin
Publication date 2012
Conference series International Science & Technology Conference
Start page 1290
End page 1298
Total pages 9
Publisher ISTEC
Place of publication [Dubai, UAE]
Keyword(s) bubble induced flow
phase field method
Hall- Héroult cell
Summary In simulations of the hydrodynamics of the multiphase flow in gas– liquid systems with finite sizes of bubbles, the important thing is to compute explicitly the time evolution of the gas–liquid interface in many engineering applications. The most commonly used methods representing this approach are: the volume of fluid and the phase field methods. The later has gained significant interest because of its capability of performing numerical computations on a fixed Cartesian grid without having to parametrise these objects (Eulerian approach) and at the same time it allows to follow the interface ( for example bubble’s shape) that change the topology. In this paper, both numerical (phase field method) and experimental results for the bubble shapes underneath a downward facing plane is presented. Experiments are carried out to see the bubble sliding motion underneath a horizontal and inclined anode. It is assumed that the bubble formed under the anode surface is deformed (flattened) due to buoyant field before it goes around the anode corner. The bubble elongates to form a tail-like shape. The change in shape of the bubble is almost instantaneous and has a significant effect on the localised hydrodynamics around the bubble, which could influence the dynamics of the flow patterns in the Hall–Héroult cell. This deformation is the main cause of the bubble wake and the induced flow field in the aluminium cell. Various parameters such as bubble size, deformation and its sliding mechanism at different surface tensions are discussed and compared with experimental results.
Language eng
Field of Research 091307 Numerical Modelling and Mechanical Characterisation
Socio Economic Objective 840301 Alumina Production
HERDC Research category E2 Full written paper - non-refereed / Abstract reviewed
HERDC collection year 2012
Persistent URL http://hdl.handle.net/10536/DRO/DU:30052613

Document type: Conference Paper
Collection: School of Engineering
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