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Near-wall damping in model predictions of separated flows
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
2016 (English)In: International journal of computational fluid dynamics (Print), ISSN 1061-8562, E-ISSN 1029-0257, Vol. 30, no 3, 218-230 p.Article in journal (Refereed) Published
Abstract [en]

Different near-wall scalings are reviewed by the use of data from direct numerical simulations (DNS) of attached and separated adverse pressure gradient turbulent boundary layers. The turbulent boundary layer equation is analysed in order to extend the validity of existing wall damping functions to turbulent boundary layers under severe adverse pressure gradients. A proposed near-wall scaling is based on local quantities and the wall distance, which makes it applicable for general computational fluid dynamics (CFD) methods. It was found to have a similar behaviour as the pressure-gradient corrected analytical y(*) scaling and avoids the inconsistencies present in the y(+) scaling. The performance of the model is illustrated by model computations using explicit algebraic Reynolds stress models with near-wall damping based on different scalings.

Place, publisher, year, edition, pages
Taylor & Francis, 2016. Vol. 30, no 3, 218-230 p.
Keyword [en]
turbulent boundary layer, adverse pressure gradient, separation, turbulence modelling, direct numerical simulation, damping function
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-192772DOI: 10.1080/10618562.2016.1194402ISI: 000381071700002Scopus ID: 2-s2.0-84978833986OAI: oai:DiVA.org:kth-192772DiVA: diva2:974487
Note

QC 20160926

Available from: 2016-09-26 Created: 2016-09-20 Last updated: 2017-11-21Bibliographically approved

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