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dc.contributor.advisorNydal, Ole Jørgennb_NO
dc.contributor.authorAndersen, Evennb_NO
dc.date.accessioned2014-12-19T11:49:06Z
dc.date.available2014-12-19T11:49:06Z
dc.date.created2012-11-08nb_NO
dc.date.issued2012nb_NO
dc.identifier566283nb_NO
dc.identifierntnudaim:7876nb_NO
dc.identifier.urihttp://hdl.handle.net/11250/234823
dc.description.abstractSimulations on liquid loads and flow rates which the Taitel-Dukler model predicts to have multiple solutions have been performed with ANSYS Fluent and LedaFlow. Both steady state and transient results in one, two and three dimensional flows are reported in this work. The hypothesis that the holdup of a pipe operated in the multiple solution region will be determined by the downstream holdup is investigated. Some results indicate that the hypothesized interface level gradients effects are correct.The Fluent steady state simulations had mass imbalance issues in addition to being both grid and geometry dependent, but produced results consistent with the independent Fluent transient simulations. The one dimension LedaFlow solver illustrated the effect shear stress modeling have on the multivalued solution region. The solver chose the intermediate solution for some flow rates, which by physical arguments can be excluded. The novel solver LedaFlow Q3D produced transient results displaying the wavy surface of the high holdup solutions. The results from the different models are deviating, but it is hard to predict which results are most the accurate since no comparison with experimental results have been conducted.nb_NO
dc.languageengnb_NO
dc.publisherInstitutt for energi- og prosessteknikknb_NO
dc.subjectntnudaim:7876no_NO
dc.subjectMTPROD produktutvikling og produksjonno_NO
dc.subjectEnergi-, prosess- og strømningsteknikkno_NO
dc.titleMultiple Holdup Solutions and the Effect of Interface Level Gradientsnb_NO
dc.typeMaster thesisnb_NO
dc.source.pagenumber76nb_NO
dc.contributor.departmentNorges teknisk-naturvitenskapelige universitet, Fakultet for ingeniørvitenskap og teknologi, Institutt for energi- og prosessteknikknb_NO


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