kth.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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
Reynolds-number effects on the outer region of adverse-pressure-gradient turbulent boundary layers
Department of Mechanical Engineering, University of Melbourne, Parkville, Victoria 3010, Australia.
Department of Mechanical Engineering, University of Melbourne, Parkville, Victoria 3010, Australia; Physics of Fluids Group, University of Twente, P.O. Box 217, 7500AE Enschede, Netherlands.
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Fluid Mechanics and Engineering Acoustics.ORCID iD: 0000-0001-6570-5499
Department of Mechanical Engineering, University of Melbourne, Parkville, Victoria 3010, Australia.
Show others and affiliations
2023 (English)In: Physical Review Fluids, E-ISSN 2469-990X, Vol. 8, no 12, article id 124604Article in journal (Refereed) Published
Abstract [en]

We study the Reynolds-number effects on the outer region of moderate adverse-pressure-gradient (APG) turbulent boundary layers (TBLs) and find that their small-scale (viscous) energy reduces with increasing friction Reynolds number (Reτ). The trend is based on analyzing APG TBL data across 600≲Reτ≲7000 and contrasts with the negligible variation in small viscous-scaled energy noted for canonical wall flows. The data sets considered include those from a well-resolved numerical simulation [Pozuelo, J. Fluid Mech. 939, A34 (2022)0022-112010.1017/jfm.2022.221], which provides access to an APG TBL maintained at near-equilibrium conditions across 1000≲Reτ≲ 2000, with a well-defined flow history, and a new high-Reτ (∼7000) experimental study from the large Melbourne wind tunnel, with its long test section modified to permit development of an APG TBL from a "canonical"upstream condition. The decrease in small-scale energy with Reτ is revealed via decomposing the streamwise normal stresses into small- and large-scale contributions, based on a sharp spectral cutoff. The origin for this trend is traced back to the production of turbulent kinetic energy in an APG TBL, the small-scale contribution to which is also found to decrease with Reτ in the outer region. The conclusion is reaffirmed by investigating attenuation of streamwise normal stresses due to changing spatial resolutions of the numerical grid or hotwire sensors, which reduces with increasing Reτ and is found to be negligible at Reτ∼7000 in this study. The results emphasize that new scaling arguments and spatial-resolution corrections should be tested rigorously across a broad Reτ range, particularly for pressure gradient TBLs.

Place, publisher, year, edition, pages
American Physical Society (APS) , 2023. Vol. 8, no 12, article id 124604
National Category
Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-341595DOI: 10.1103/PhysRevFluids.8.124604ISI: 001128822800003Scopus ID: 2-s2.0-85179549351OAI: oai:DiVA.org:kth-341595DiVA, id: diva2:1822634
Note

QC 20231227

Available from: 2023-12-27 Created: 2023-12-27 Last updated: 2024-02-29Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records

Vinuesa, Ricardo

Search in DiVA

By author/editor
Vinuesa, Ricardo
By organisation
Linné Flow Center, FLOWFluid Mechanics and Engineering Acoustics
In the same journal
Physical Review Fluids
Fluid Mechanics and Acoustics

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 56 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • 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