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dc.contributor.authorCloete, Jan Hendrik
dc.contributor.authorCloete, Schalk Willem Petrus
dc.contributor.authorRadl, Stefan
dc.contributor.authorAmini, Shahriar
dc.date.accessioned2020-05-07T09:28:22Z
dc.date.available2020-05-07T09:28:22Z
dc.date.created2019-08-22T12:10:08Z
dc.date.issued2019
dc.identifier.citationChemical Engineering Science. 2019, 207 379-396.en_US
dc.identifier.issn0009-2509
dc.identifier.urihttps://hdl.handle.net/11250/2653602
dc.description.abstractFiltered Two Fluid Models (fTFMs) aim to enable accurate industrial-scale simulations of fluidized beds by means of closures accounting for the effects of bubbles and clusters. The present study aims to improve anisotropic closures for the drift velocity, which is the primary sub-grid effect altering the filtered drag force, by deriving increasingly complex closures by considering additional independent variables (markers). Three different anisotropic closures, as well as an isotropic closure, are evaluated. A priori tests revealed a significant increase in the predictive capability of the closures as the complexity, in terms of the number of markers considered, increases. However, this improvement is relatively small when compared to the effect of considering anisotropy. Next, a posteriori tests were completed by comparing coarse-grid simulations of bubbling, turbulent and core-annular fluidization against benchmark resolved TFM simulations. This analysis shows good performance of all anisotropic closures, with negligible to minor effects of increasing the drag closure’s complexity by considering additional markers. On the other hand, the isotropic closure lacks generality and shows poor grid independence behaviour. It is therefore concluded that it is essential to include important physical effects, such as anisotropy, in fTFM closures, while complexity in terms of the number of markers considered is of lesser importance.en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.subjectFluidized beden_US
dc.subjectComputational fluid dynamicsen_US
dc.subjectFiltered two fluid modelen_US
dc.subjectCoarse-grid simulationsen_US
dc.subjectDragen_US
dc.titleOn the choice of closure complexity in anisotropic drag closures for filtered Two Fluid Modelsen_US
dc.typeJournal articleen_US
dc.typePeer revieweden_US
dc.description.versionacceptedVersionen_US
dc.rights.holderPostprint version of published article, published under a CC-NC-ND licenseen_US
dc.source.pagenumber379-396en_US
dc.source.volume207en_US
dc.source.journalChemical Engineering Scienceen_US
dc.identifier.doi10.1016/j.ces.2019.06.006
dc.identifier.cristin1717969
dc.relation.projectNotur/NorStore: NS1008Ken_US
dc.relation.projectNotur/NorStore: NN1008Ken_US
dc.relation.projectEU/604656en_US
dc.relation.projectEU/271511en_US
dc.relation.projectNorges forskningsråd: 691712en_US
cristin.unitcode7401,80,40,0
cristin.unitnameProsessteknologi
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.fulltextpostprint
cristin.qualitycode2


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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