Hydrodynamics of water flows around air bubbles in flotation: a review

Nguyen, A. V. (1999) Hydrodynamics of water flows around air bubbles in flotation: a review. International Journal of Mineral Processing, 56 1-4: 165-205. doi:10.1016/S0301-7516(98)00047-7

Author Nguyen, A. V.
Title Hydrodynamics of water flows around air bubbles in flotation: a review
Journal name International Journal of Mineral Processing   Check publisher's open access policy
ISSN 0301-7516
Publication date 1999
Sub-type Article (original research)
DOI 10.1016/S0301-7516(98)00047-7
Volume 56
Issue 1-4
Start page 165
End page 205
Total pages 41
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Abstract This review aims to predict liquid velocity components around an air bubble in flotation. The prediction is based on the Navier–Stokes equations expressed in terms of stream function and vorticity. The relevant analytical and approximate solutions for a bubble mobile and immobile surface are reviewed. Numerical solutions to the Navier–Stokes equations with particular reference on the flow fore-and-aft asymmetry, surface vorticity and surface pressure are graphically illustrated and discussed. Based on the analytical, approximate and numerical solutions, the liquid velocity components in close proximity to a surface of air bubbles with intermediate Reynolds numbers and finite gas holdups are predicted. Application of the predicted velocity components is illustrated for the modelling of the bubble–particle encounter and sliding interactions. Generalised formulas for the bubble–particle encounter and attachment efficiencies are demonstrated. The analysis of the inertial effect on the bubble–particle interactions with a small particle Stokes number is undertaken and reveals that the inertial effect is relevant if the bubble surface is mobile. The significance of the gas holdup and the bubble surface mobility in the bubble–particle interactions is analysed and discussed.
Keyword Air bubble
Bubble–particle interaction
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemical Engineering Publications
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Citation counts: TR Web of Science Citation Count  Cited 34 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 41 times in Scopus Article | Citations
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Created: Sat, 30 Mar 2013, 23:23:54 EST by Professor Anh Nguyen on behalf of School of Chemical Engineering