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dc.contributor.authorOlsen, Jan Erik
dc.contributor.authorSkjetne, Paal
dc.contributor.authorJohansen, Stein Tore
dc.date.accessioned2020-12-21T08:23:49Z
dc.date.available2020-12-21T08:23:49Z
dc.date.created2017-08-31T10:38:10Z
dc.date.issued2017
dc.identifier.citationApplied Mathematical Modelling. 2017, 44 61-71.en_US
dc.identifier.issn0307-904X
dc.identifier.urihttps://hdl.handle.net/11250/2720466
dc.description.abstractTraditional Reynolds-averaged Navier–Stokes (RANS) approaches to turbulence modeling, such as the k-ϵ model, have some well-known shortcomings when modeling transient flow phenomena. To mitigate this, a filtered URANS model has been derived where turbulent structures larger than a given filter size (typically grid size) is captured by the flow equations and smaller structures are modeled according to a modified k-ϵ model. This modeling approach is also known as a VLES model (Very Large Eddy Scale model), and provides more details of the transient turbulence than the k-ϵ model at little extra computational cost. In this study a two-phase extension to the VLES model is described. A modeling concept for bubble plumes has been developed in which the bubbles are tracked as particles and the flow of liquid is solved by the Navier–Stokes equations in a traditional mesh based approach. The flow of bubbles and liquid is coupled in an Eulerian–Lagrangian model. Turbulent dispersion of the bubbles is treated by a random walk model. The random walk model depends on an estimation of the eddy life time. The eddy life time for the VLES model differs from a k-ϵ model, and its mathematical expression is derived. The model is applied to ocean plumes emanating from discharge of gas at the ocean floor. Validation with experiments and comparison with k-ϵ model are shown.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.subjectLagrangianen_US
dc.subjectCFDen_US
dc.subjectVLESen_US
dc.subjectturbulenceen_US
dc.subjectplumeen_US
dc.subjectbubbleen_US
dc.titleVLES turbulence model for an Eulerian–Lagrangian modeling concept for bubble plumesen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionacceptedVersionen_US
dc.rights.holderThis is the peer-reviewed, accepted manuscript of the article. The published article is available at ScienceDirect: https://doi.org/10.1016/j.apm.2017.01.031en_US
dc.source.pagenumber61-71en_US
dc.source.volume44en_US
dc.source.journalApplied Mathematical Modellingen_US
dc.identifier.doi10.1016/j.apm.2017.01.031
dc.identifier.cristin1490133
cristin.unitcode7401,80,0,0
cristin.unitnameSINTEF Materialer og kjemi
cristin.ispublishedtrue
cristin.fulltextpostprint
cristin.qualitycode1


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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