Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Explicit algebraic subgrid stress models with application to rotating channel 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.ORCID iD: 0000-0002-9819-2906
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.ORCID iD: 0000-0002-2711-4687
2009 (English)In: Journal of Fluid Mechanics, ISSN 0022-1120, E-ISSN 1469-7645, Vol. 639, 403-432 p.Article in journal (Refereed) Published
Abstract [en]

New explicit subgrid stress models are proposed involving the strain rate and rotation rate tensor, which can account for rotation in a natural way. The new models are based on the same methodology that leads to the explicit algebraic Reynolds stress model formulation for Reynolds-averaged Navier-Stokes simulations. One dynamic model and one non-dynamic model are proposed. The non-dynamic model represents a computationally efficient subgrid scale (SGS) stress model, whereas the dynamic model is the most accurate. The models are validated through large eddy simulations (LESs) of spanwise and streamwise rotating channel flow and are compared with the standard and dynamic Smagorinsky models. The proposed explicit dependence on the system rotation improves the description of the mean velocity profiles and the turbulent kinetic energy at high rotation rates. Comparison with the dynamic Smagorinsky model shows that not using the eddy-viscosity assumption improves the description of both the Reynolds stress anisotropy and the SGS stress anisotropy. LESs of rotating channel flow at Re-tau = 950 have been carried out as well. These reveal some significant Reynolds number influences on the turbulence statistics. LESs of non-rotating turbulent channel flow at Re-tau = 950 show that the new explicit model especially at coarse resolutions significantly better predicts the mean velocity, wall shear and Reynolds stresses than the dynamic Smagorinsky model, which is probably the result of a better prediction of the anisotropy of the subgrid dissipation.

Place, publisher, year, edition, pages
2009. Vol. 639, 403-432 p.
Keyword [en]
LARGE-EDDY SIMULATION; DIRECT NUMERICAL-SIMULATION; TURBULENT FLOWS; SCALE STRESSES; CLOSURE METHOD; TRANSPORT
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-8697DOI: 10.1017/S0022112009991054ISI: 000272521600015Scopus ID: 2-s2.0-76349094920OAI: oai:DiVA.org:kth-8697DiVA: diva2:14085
Note
QC 20100825. Uppdaterad från submitted till published (20100825).Available from: 2008-06-05 Created: 2008-06-05 Last updated: 2010-08-25Bibliographically 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

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Authority records BETA

Brethouwer, GeertJohansson, Arne V.

Search in DiVA

By author/editor
Marstorp, LinusBrethouwer, GeertGrundestam, OlofJohansson, Arne V.
By organisation
MechanicsLinné Flow Center, FLOW
In the same journal
Journal of Fluid Mechanics
Fluid Mechanics and Acoustics

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 63 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf