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Large-eddy simulation using the explicit algebraic subgrid model in complex geometries
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics, Turbulence. KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0002-3173-7502
KTH, School of Engineering Sciences (SCI), Mechanics, Turbulence. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0001-8692-0956
KTH, School of Engineering Sciences (SCI), Mechanics, Turbulence. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, Centres, SeRC - Swedish e-Science Research Centre.ORCID iD: 0000-0002-9819-2906
KTH, School of Engineering Sciences (SCI), Mechanics, Turbulence. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, Centres, SeRC - Swedish e-Science Research Centre.ORCID iD: 0000-0002-2711-4687
2013 (English)In: International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013, TSFP-8 , 2013Conference paper, Published paper (Refereed)
Abstract [en]

In Rasam et al. (2011) we compared the performance of the explicit algebraic subgrid-scale (SGS) model (EASSM) (Marstorp et al., 2009) with that of the conventional dynamic Smagorinsky model (DSM) in large eddy simulation (LES) of channel flow using a pseudo-spectral Navier-Stokes solver. We showed that, due to the better prediction of the individual SGS stresses in a wide range of grid resolutions and due to the nonlinear SGS stress contribution by the model, the EASSM predictions were less resolution dependent and more accurate than those of the DSM. As the first step in this study towards LES in complex geometries, we extend our previous study and perform LES of turbulent channel flow at Ret = 590 using the EASSM and the code Saturne, which is an unstructured finite volume solver suitable for LES in complex geometries. The results are compared to those of the DSM and show that the EASSM predictions of the wall shear and the Reynolds stresses are more accurate. LES results using the EASSM obtained from the code Saturne are also compared to those obtained using the pseudo-spectral solver obtained in our previous study (Rasam et al., 2013). As the next step, we are performing LES of flow over periodic hill using the EASSM and the code Saturne. The results will be compared with those of the DSM and the reference LES and will be presented at the conference.

Place, publisher, year, edition, pages
TSFP-8 , 2013.
Keywords [en]
Algebra, Aluminum, Channel flow, Codes (symbols), Forecasting, Geometry, Navier Stokes equations, Reynolds number, Shear flow, Turbulence, Complex geometries, Dynamic Smagorinsky models, Grid resolution, Navier-Stokes solver, Reynolds stress, Subgrid model, Subgrid scale models, Turbulent channel flows, Large eddy simulation
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-222980Scopus ID: 2-s2.0-85034023752ISBN: 9780000000002 OAI: oai:DiVA.org:kth-222980DiVA, id: diva2:1193259
Conference
8th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2013, 28 August 2013 through 30 August 2013
Note

QC 21080326

Available from: 2018-03-26 Created: 2018-03-26 Last updated: 2018-05-24Bibliographically approved

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Rasam, AminWallin, StefanBrethouwer, GertJohansson, Arne V.

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Rasam, AminWallin, StefanBrethouwer, GertJohansson, Arne V.
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Linné Flow Center, FLOWTurbulenceAeronautical and Vehicle EngineeringSeRC - Swedish e-Science Research Centre
Fluid Mechanics and Acoustics

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