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Permanent link (DOI): https://doi.org/10.7939/R3Z66W

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Modeling cavitation in a high intensity agitation cell Open Access

Descriptions

Other title
Subject/Keyword
High intensity agitation
flotation
hydrodynamic cavitation
turbulence dissipation
computational fluid dynamics
population balance
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Jose, July
Supervisor and department
Hayes R. E. ( Chemical and Materials Engineering )
Xu, Zhenghe ( Chemical and Materials Engineering )
Examining committee member and department
Hayes R. E. ( Chemical and Materials Engineering )
Leung, Juliana ( Civil and Environmental Engineering )
Xu, Zhenghe ( Chemical and Materials Engineering )
Department
Department of Chemical and Materials Engineering
Specialization

Date accepted
2011-04-15T16:32:51Z
Graduation date
2011-06
Degree
Master of Science
Degree level
Master's
Abstract
The presence of hydrodynamically generated air bubbles has been observed to enhance fine particle flotation in a high intensity agitation (HIA) flotation cell. In this study, the cavitation in an HIA cell, used in our laboratory, is studied by hydrodynamic computational fluid dynamics. Different types of impellers are studied to obtain flow characteristics such as velocity and pressure distributions and turbulent dissipation rate in a two-baffled HIA cell. A cavitation model in conjunction with a multiphase mixture model is used to predict the vapor generation in the HIA cell. Cavitating flow is simulated as a function of revolution speed (RPM) and dissolved gas concentration to understand the dependency of hydrodynamic cavitation on these operating parameters. For comparison, cavitation in a pressure driven flow through a constriction is also modeled. A population balance model is used to obtain bubble size distributions of the generated cavities in a flow through constriction.
Language
English
DOI
doi:10.7939/R3Z66W
Rights
License granted by July Jose (july@ualberta.ca) on 2011-04-15T05:00:44Z (GMT): Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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