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Validation of SGS models in large eddy simulation of turbulent zero pressure gradient boundary layer flow
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics.
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics.
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics.ORCID iD: 0000-0001-9627-5903
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics.ORCID iD: 0000-0002-9819-2906
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2008 (English)Report (Other academic)
Place, publisher, year, edition, pages
2008.
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-8699OAI: oai:DiVA.org:kth-8699DiVA: diva2:14087
Note

QC 20100826

Available from: 2008-06-05 Created: 2008-06-05 Last updated: 2016-05-11Bibliographically approved
In thesis
1. Modelling of subgrid-scale stress and passive scalar flux in large eddy simulations of wall bounded turbulent flows
Open this publication in new window or tab >>Modelling of subgrid-scale stress and passive scalar flux in large eddy simulations of wall bounded turbulent flows
2008 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

The aim of the thesis is to develop and validate subgrid-scale models that are relevant for large eddy simulations of complex flows including scalar mixing. A stochastic Smagorinsky model with adjustable variance and time scale is developed by adding a stochastic component to the Smagorinsky constant. The stochastic model is shown to provide for backscatter of both kinetic energy and scalar variance without causing numerical instabilities. In addition, new models for the subgrid-scale stress and passive scalar flux are derived from modelled subgrid scale transport equations. These models properly account for the anisotropy of the subgrid scales and have potentials wall bounded flows. The proposed models are validated in wall bounded flows with and without rotation and show potential or significantly improve predictions for such cases.      

Place, publisher, year, edition, pages
Stockholm: KTH, 2008. iii, 22 p.
Series
Trita-MEK, ISSN 0348-467X ; 2008:06
Keyword
Turbulence, large-eddy simulation, subgrid-scale model
National Category
Fluid Mechanics and Acoustics
Identifiers
urn:nbn:se:kth:diva-4809 (URN)
Public defence
2008-06-13, Sal D3, KTH, Lindstedtsvägen 5, Stockholm, 10:30
Opponent
Supervisors
Note

QC 20100826

Available from: 2008-06-05 Created: 2008-06-05 Last updated: 2013-10-30Bibliographically approved

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Schlatter, PhilippBrethouwer, GeertJohansson, Arne V.

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