Show simple item record

dc.contributor.advisorPakzad, Leila
dc.contributor.authorAgahzamin, Siamak
dc.date.accessioned2020-03-11T18:10:49Z
dc.date.available2020-03-11T18:10:49Z
dc.date.created2018
dc.date.issued2018
dc.identifier.urihttp://knowledgecommons.lakeheadu.ca:7070/handle/2453/4570
dc.description.abstractVertical internals are widely installed in the bubble columns as heat exchangers or illuminating tubes. This research aims to investigate the effect of dense vertical internals (rods) on the performance of bubble columns. The Eulerian-Eulerian model coupled with the population balance model was used to develop the CFD simulation. The effect of interfacial forces on the results was studied by applying different models. The results indicated that just by choosing the appropriate interfacial forces, the numerical model agrees well with the experimental data. A sharper gas holdup, a stronger gas velocity gradient, and a more intense liquid recirculation were observed as important impacts of the internals. Moreover, three circular internals’ arrangements were considered to study the effect of wall and core clearance distances on the bubble column hydrodynamics. The results revealed that by increasing the wall clearance distance, flatter gas holdup and velocity distributions could be achieved. Furthermore, the capability of the population balance model in the prediction of the bubble size distribution in the presence of internals was assessed, and a modification factor for the population balance kernels was proposed. Moreover, the impulse tracer injection was applied to study the gas dispersion in the bubble column. The results showed that the presence of internals has a notable effect on the gas behavior. Less turbulence and dispersion were found in the presence of internals. To study the liquid mixing, the tracer technique was applied. The presence of internals reduced the fluctuating liquid velocities, which led to a lower mixing performance in the bubble column.en_US
dc.language.isoen_USen_US
dc.subjectBubble columnen_US
dc.subjectVertical internalsen_US
dc.subjectPopulation balance modelen_US
dc.subjectGas dispersionen_US
dc.subjectLiquid mixingen_US
dc.titleThe effect of vertical internals on the hydrodynamics and phase dispersions in bubble columns: CFD simulation and population balance modelen_US
dc.typeThesisen_US
etd.degree.nameMaster of Scienceen_US
etd.degree.levelMasteren_US
etd.degree.disciplineEngineering :Chemcalen_US
etd.degree.grantorLakehead Universityen_US
dc.contributor.committeememberFatehi, Pedram
dc.contributor.committeememberTarokh, Ali


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record