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dc.contributor.authorSeim, Knut Sponheim
dc.contributor.authorFer, Ilker
dc.contributor.authorAvlesen, Helge
dc.PublishedSeim KS, Fer I, Avlesen H. Stratified flow over complex topography: A model study of the bottom drag and associated mixing. Continental Shelf Research. 2012;34:41-52eng
dc.description.abstractThe flow of stratified fluid over complex topography may lead to a significant drag on the fluid, exerted by the bottom obstacles. Using a 2-m resolution, three-dimensional, non-hydrostatic numerical ocean model, the drag and associated mixing on a stratified flow over real, 1-m resolution topography (interpolated to model resolution) is studied. With a typical mountain height of 12 m in 174 m water and buoyancy frequencies ranging from 0:6 102 s1 to 1:2 102 s1, resolving the topographic features leads to extensive drag exerted on the flow manifested through three different processes: (i) gravity wave drag, (ii) aerodynamic or blocked flow drag, and (iii) hydraulic drag. A parameterization of the internal wave drag based on linear, two-dimensional, hydrostatic wave solutions provides satisfactory results in terms of the turbulent kinetic energy levels. The depth of the layer where the vertical momentum flux is deposited, however, is underestimated, leading to an overestimated gravity wave drag in the layer. & 20en_US
dc.rightsAttribution CC BY-NC-NDeng
dc.subjectStratified floweng
dc.subjectComplex topographyeng
dc.subjectInternal gravity wave drageng
dc.titleStratified flow over complex topography: A model study of the bottom drag and associated mixingen_US
dc.typePeer reviewed
dc.typeJournal article
dc.rights.holderCopyright 2012 Elsevier Ltden_US
dc.source.journalContinental Shelf Research
dc.relation.projectNorges forskningsråd: 204867
dc.subject.nsiVDP::Matematikk og naturvitenskap: 400::Geofag: 450::Oseanografi: 452
dc.subject.nsiVDP::Mathematics and natural scienses: 400::Geosciences: 450::Oceanography: 452

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