An assessment of Average Bubble Number Density model for bubbly flows

Cheung, C, Duan, X, Yeoh, G, Tu, J, Krepper, E and Lucas, D 2010, 'An assessment of Average Bubble Number Density model for bubbly flows', in Gordon Mallinson (ed.) 17th Australasian Fluid Mechanics Conference Proceedings, Auckland, New Zealand, 5-9 December 2010, pp. 535-538.


Document type: Conference Paper
Collection: Conference Papers

Title An assessment of Average Bubble Number Density model for bubbly flows
Author(s) Cheung, C
Duan, X
Yeoh, G
Tu, J
Krepper, E
Lucas, D
Year 2010
Conference name 17th Australasian Fluid Mechanics Conference 2010
Conference location Auckland, New Zealand
Conference dates 5-9 December 2010
Proceedings title 17th Australasian Fluid Mechanics Conference Proceedings
Editor(s) Gordon Mallinson
Publisher University of Auckland
Place of publication Auckland, New Zealand
Start page 535
End page 538
Total pages 4
Abstract Gas-liquid bubbly flows with wide range of bubble sizes are commonly encountered in many industrial applications. Based on our previous study, a generalized Average Bubble Number Density (ABND) model has been developed to model the dynamical changes of bubble size due to bubble coalescence and breakage mechanism. With the aim to asses the model performance, numerical studies have been performed to validate the model predictions against experimental data. Three experimental data [7,10,12] exhibiting totally different bubble size evolution trends were strategically selected for the present validation study. Numerical predictions were validated against measured results under three different experimental conditions. In general, predictions of the ABND model yield good agreement with experimental data. The encouraging results demonstrated the capability of the ABND model in capturing the changes of bubbles size due to bubble interactions and the transition from "wall peak" to "core peak" gas volume fraction profiles under various flow conditions. Merits and drawbacks of the ABND model for industrial application are also discussed.
Subjects Computational Fluid Dynamics
Keyword(s) Breakage mechanism
Bubble coalescence
Bubble interaction
Bubble number densities
Bubble size
Bubbly flow
Evolution trend
Experimental conditions
Experimental data
Flow condition
Gas liquids
Gas volume fraction
Measured results
Model performance
Model prediction
Model yields
Numerical predictions
Numerical studies
Validation study
Copyright notice © 2010 University of Auckland
ISBN 9781617829130
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