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dc.contributor.authorFutatani, Shimpei
dc.contributor.authorFarge, Marie
dc.contributor.authorBos, Wouter J.T.
dc.contributor.authordel Castillo Negrete, Diego
dc.contributor.authorSchneider, Kai
dc.contributor.authorBenkadda, Sadedruddin
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.date.accessioned2022-01-11T11:21:01Z
dc.date.available2022-01-11T11:21:01Z
dc.date.issued2011-03
dc.identifier.citationFutatani, S. [et al.]. Coherent vorticity extraction in resistive drift-wave turbulence: Comparison of orthogonal wavelets versus proper orthogonal decomposition. "Comptes rendus physique", Març 2011, vol. 12, núm. 2, p. 123-131.
dc.identifier.issn1631-0705
dc.identifier.urihttp://hdl.handle.net/2117/359283
dc.description.abstractWe assess two techniques for extracting coherent vortices out of turbulent flows: the wavelet based Coherent Vorticity Extraction (CVE) and the Proper Orthogonal Decomposition (POD). The former decomposes the flow field into an orthogonal wavelet representation and subsequent thresholding of the coefficients allows one to split the flow into organized coherent vortices with non-Gaussian statistics and an incoherent random part which is structureless. POD is based on the singular value decomposition and decomposes the flow into basis functions which are optimal with respect to the retained energy for the ensemble average. Both techniques are applied to direct numerical simulation data of two-dimensional drift-wave turbulence governed by Hasegawa–Wakatani equation, considering two limit cases: the quasi-hydrodynamic and the quasi-adiabatic regimes. The results are compared in terms of compression rate, retained energy, retained enstrophy and retained radial flux, together with the enstrophy spectrum and higher order statistics.
dc.format.extent9 p.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Energies::Tecnologia energètica::Emmagatzematge i transport de l'energia
dc.subject.lcshPlasma turbulence
dc.subject.otherProper orthogonal decomposition
dc.subject.otherWavelets
dc.subject.otherPlasma turbulence
dc.subject.otherCoherent structures
dc.titleCoherent vorticity extraction in resistive drift-wave turbulence: Comparison of orthogonal wavelets versus proper orthogonal decomposition
dc.typeArticle
dc.subject.lemacEnergia--Emmagatzematge
dc.contributor.groupUniversitat Politècnica de Catalunya. ANT - Advanced Nuclear Technologies Research Group
dc.identifier.doi10.1016/j.crhy.2010.12.004
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S1631070510001672
dc.rights.accessOpen Access
local.identifier.drac32083843
dc.description.versionPostprint (published version)
local.citation.authorFutatani, S.; Farge, M.; Bos, W.; Negrete, D.; Schneider, K.; Benkadda, S.
local.citation.publicationNameComptes rendus physique
local.citation.volume12
local.citation.number2
local.citation.startingPage123
local.citation.endingPage131


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