Large eddy simulation of turbulent channel flows by the rational large eddy simulation model

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dc.contributor.authorIliescu, Traianen
dc.contributor.authorFischer, P. F.en
dc.contributor.departmentMathematicsen
dc.date.accessed2014-04-04en
dc.date.accessioned2014-04-24T18:34:14Zen
dc.date.available2014-04-24T18:34:14Zen
dc.date.issued2003-10en
dc.description.abstractThe rational large eddy simulation (RLES) model is applied to turbulent channel flows. This approximate deconvolution model is based on a rational (subdiagonal Pade) approximation of the Fourier transform of the Gaussian filter and is proposed as an alternative to the gradient (also known as the nonlinear or tensor-diffusivity) model. We used a spectral element code to perform large eddy simulations of incompressible channel flows at Reynolds numbers based on the friction velocity and the channel half-width Re(tau)=180 and Re(tau)=395. We compared the RLES model with the gradient model and the Smagorinsky model with Van Driest damping. The RLES model was much more stable than the gradient model and yielded improved results. Both the RLES model and the gradient model predicted the off-diagonal Reynolds stresses better than the Smagorinsky model with Van Driest damping. The latter, however, yielded better results for the diagonal Reynolds stresses. (C) 2003 American Institute of Physics.en
dc.description.sponsorshipMathematical, Information, and Computational Sciences Division subprogram of the Office of Advanced Scientific Computing Research, U.S. Department of Energy, under Contract No. W-31-109-Eng-38en
dc.description.sponsorshipU.S. Department of Energy, Office of Advanced Scientific Computing, SciDAC program "The Terascale Simulation Tools and Techniques (TSTT) Center,"en
dc.description.sponsorshipNSF Grant No. DMS-0209309en
dc.identifier.citationIliescu, T; Fischer, PF, "Large eddy simulation of turbulent channel flows by the rational large eddy simulation model," Phys. Fluids 15, 3036 (2003); http://dx.doi.org/10.1063/1.1604781en
dc.identifier.doihttps://doi.org/10.1063/1.1604781en
dc.identifier.issn1070-6631en
dc.identifier.urihttp://hdl.handle.net/10919/47634en
dc.identifier.urlhttp://scitation.aip.org/content/aip/journal/pof2/15/10/10.1063/1.1604781en
dc.language.isoen_USen
dc.publisherAIP Publishingen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectapproximate deconvolution modelen
dc.subjectdirect numerical-simulationen
dc.subjectscaleen
dc.subjectestimation modelen
dc.subjectsubgrid-scaleen
dc.subjectcomplex-geometryen
dc.subjectreynolds-numberen
dc.subjectmixing layeren
dc.subjectstatisticsen
dc.subjectequationsen
dc.titleLarge eddy simulation of turbulent channel flows by the rational large eddy simulation modelen
dc.title.serialPhysics of Fluidsen
dc.typeArticle - Refereeden

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