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Scaling of adverse-pressure-gradient turbulent boundary layers in near-equilibrium conditions
KTH, School of Engineering Sciences (SCI), Mechanics, Stability, Transition and Control. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, Centres, SeRC - Swedish e-Science Research Centre.
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, Centres, SeRC - Swedish e-Science Research Centre.
KTH, School of Engineering Sciences (SCI), Mechanics, Fluid Physics. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
KTH, School of Engineering Sciences (SCI), Mechanics, Stability, Transition and Control. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, Centres, SeRC - Swedish e-Science Research Centre.
2017 (English)In: Progress in Turbulence VII, Springer, 2017, Vol. 196, p. 73-78Conference paper (Refereed)
Abstract [en]

Well-resolved large-eddy simulations are used to study adverse-pressure-gradient (APG) turbulent boundary layers (TBLs) under near-equilibrium conditions. In particular, we focus on two near-equilibrium cases where the power-law freestream velocity distribution is adjusted in order to produce long regions with a constant value of the Clauser pressure-gradient parameter β. In the first case we obtain an APG TBL with a constant value of β ≃ 1 over 37 average boundary-layer thicknesses, and in the second one a constant value of β ≃ 2 for around 28 average boundary-layer thicknesses. The scaling law suggested by Kitsios et al. (Int J Heat Fluid Flow 61:117–128, 2016, [10]), proposing the edge velocity and the displacement thickness as scaling parameters, was tested on the two constant-pressure-gradient parameter cases. The mean velocity and Reynolds-stress profiles were found to be dependent on the downstream development, a conclusion in agreement with classical theory.

Place, publisher, year, edition, pages
Springer, 2017. Vol. 196, p. 73-78
Series
Springer Proceedings in Physics, ISSN 0930-8989 ; 196
National Category
Other Physics Topics
Identifiers
URN: urn:nbn:se:kth:diva-212029DOI: 10.1007/978-3-319-57934-4_11Scopus ID: 2-s2.0-85022341516ISBN: 9783319579337 OAI: oai:DiVA.org:kth-212029DiVA, id: diva2:1133309
Conference
7th iTi Conference on Turbulence, 2016, Bertinoro, Italy, 7 September 2016 through 9 September 2016
Funder
Swedish e‐Science Research Center
Note

QC 20170815

Available from: 2017-08-15 Created: 2017-08-15 Last updated: 2017-08-15Bibliographically approved

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Vinuesa, RicardoBobke, AlexandraÖrlü, RamisSchlatter, Philipp
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