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Explicit Algebraic Subgrid Stress Models for Large Eddy Simulation
KTH, School of Engineering Sciences (SCI), Mechanics, Turbulence. 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), Centres, Linné Flow Center, FLOW.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.ORCID iD: 0000-0002-2711-4687
2010 (English)In: Direct and large-eddy simulation vii, 2010, 167-172 p.Conference paper, Published paper (Refereed)
Abstract [en]

New explicit subgrid stress models have been developed which are based on the same methodology that leads to the EARSM formulation for RANS. The subgrid models involve the strain rate and rotation rate tensor, and can account for rotation in a natural way. A dynamic and a non-dynamic version are proposed. The non-dynamic version is a computationally cheap SGS model, whereas the dynamic version is more accurate. Large eddy simulations of rotating channel flow have been carried out in order to test the models. Comparison with the standard and dynamic Smagorinsky models shows that the explicit dependence on the system rotation improves the description of the mean velocity profiles and the Reynolds stresses at high rotation rates. Furthermore, large eddy simulations with the new models are less sensitive to the grid resolution.

Place, publisher, year, edition, pages
2010. 167-172 p.
Series
ERCOFTAC Series, ISSN 1382-4309 ; 13
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-121662DOI: 10.1007/978-90-481-3652-0_25ISI: 000306194300025Scopus ID: 2-s2.0-84964827013ISBN: 978-90-481-3652-0 (print)OAI: oai:DiVA.org:kth-121662DiVA: diva2:627279
Conference
7th International ERCOFTAC Workshop on Direct and Large-Eddy Simulation, SEP 08-10, 2008, Trieste, ITALY
Note

QC 20130611

Available from: 2013-06-11 Created: 2013-05-03 Last updated: 2013-06-11Bibliographically approved

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Brethouwer, GeertJohansson, Arne V.

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