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Turbulence decay rate as a measure of flow dimensionality

Shats, Michael; Byrne, David; Xia, Hua

Description

The dimensionality of turbulence in fluid layers determines their properties. We study electromagnetically driven flows in finite-depth fluid layers and show that eddy viscosity, which appears as a result of three-dimensional motions, leads to increased bottom damping. The anomaly coefficient, which characterizes the deviation of damping from the one derived using a quasi-two-dimensional model, can be used as a measure of the flow dimensionality. Experiments in turbulent layers show that when...[Show more]

dc.contributor.authorShats, Michael
dc.contributor.authorByrne, David
dc.contributor.authorXia, Hua
dc.date.accessioned2015-12-10T22:53:03Z
dc.identifier.issn0031-9007
dc.identifier.urihttp://hdl.handle.net/1885/59191
dc.description.abstractThe dimensionality of turbulence in fluid layers determines their properties. We study electromagnetically driven flows in finite-depth fluid layers and show that eddy viscosity, which appears as a result of three-dimensional motions, leads to increased bottom damping. The anomaly coefficient, which characterizes the deviation of damping from the one derived using a quasi-two-dimensional model, can be used as a measure of the flow dimensionality. Experiments in turbulent layers show that when the anomaly coefficient becomes high, the turbulent inverse energy cascade is suppressed. In the opposite limit turbulence can self-organize into a coherent flow.
dc.publisherAmerican Physical Society
dc.sourcePhysical Review Letters
dc.subjectKeywords: Eddy viscosity; Electromagnetically driven flow; Fluid layer; Inverse energy cascades; Self-organize; Three-dimensional motion; Turbulence decay; Turbulent layer; Two dimensional model; Damping; Decay (organic); Turbulence
dc.titleTurbulence decay rate as a measure of flow dimensionality
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume105
dc.date.issued2010
local.identifier.absfor020303 - Fluid Physics
local.identifier.ariespublicationf2965xPUB478
local.type.statusPublished Version
local.contributor.affiliationShats, Michael, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationByrne, David, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationXia, Hua, College of Physical and Mathematical Sciences, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.issue26
local.bibliographicCitation.startpage264501 (4)
local.identifier.doi10.1103/PhysRevLett.105.264501
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
dc.date.updated2016-02-24T08:29:46Z
local.identifier.scopusID2-s2.0-78650496774
local.identifier.thomsonID000286761900006
CollectionsANU Research Publications

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