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. / Chemical Engineering
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:AEU.10048/1914 |
| Date | 06 1900 |
| Creators | Jose, July |
| Contributors | Xu, Zhenghe ( Chemical and Materials Engineering ), Hayes R. E. ( Chemical and Materials Engineering ), Xu, Zhenghe ( Chemical and Materials Engineering ), Hayes R. E. ( Chemical and Materials Engineering ), Leung, Juliana ( Civil and Environmental Engineering ) |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Format | 2000721 bytes, application/pdf |
| Relation | J. K. Jose, J.P. Mmbaga, R.E. Hayes and Z. Xu, (2011), Canadian Journal of Chemical Engineering |
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