kth.sePublikationer KTH
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Utilizing indicator functions with computational data to confirm nature of overlap in normal turbulent stresses: Logarithmic or quarter-power
ILLINOIS TECH (I.I.T), Chicago, Illinois 60616, USA.
KTH, Skolan för teknikvetenskap (SCI), Centra, Linné Flow Center, FLOW. KTH, Skolan för teknikvetenskap (SCI), Teknisk mekanik, Strömningsmekanik.ORCID-id: 0000-0001-6570-5499
Instituto Universitario de Matemática Pura y Aplicada, Universitat Politècnica de València, Valencia 46022, Spain.
2024 (Engelska)Ingår i: Physics of fluids, ISSN 1070-6631, E-ISSN 1089-7666, Vol. 36, nr 7, artikel-id 075145Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Indicator functions of the streamwise normal-stress profiles (NSP), based on careful differentiation of some of the best direct numerical simulations (DNS) data from channel and pipe flows, over the range 550 < R e τ < 16 000 , are examined to establish the existence and range in wall distances of either a logarithmic-trend segment or a 1/4-power region. For nine out of 15 cases of DNS data we examined where R e τ < 2000 , the NSP did not contain either of the proposed trends. As R e τ exceeds around 2000 a 1/4-power, reflecting the “bounded-dissipation” predictions of Chen and Sreenivasan [“Law of bounded dissipation and its consequences in turbulent wall flows,” J. Fluid Mech. 933, A20 (2022); “Reynolds number asymptotics of wall-turbulence fluctuations,” J. Fluid Mech. 976, A21 (2023)] and data analysis of Monkewitz [“Reynolds number scaling and inner-outer overlap of stream-wise Reynoldss stress in wall turbulence,” arXiv:2307.00612 (2023)], develops near y + = 1000 and expands with Reynolds numbers extending to 1000 < y + < 10 000 for R e τ around 15 000. This range of 1/4-power NSP corresponds to a range of outer-scaled Y between around 0.3 and 0.7. The computational database examined did not include the zero-pressure-gradient boundary layer experiments at higher Reynolds numbers where the logarithmic trend in the NSP has been previously reported around y+ of 1000 by Marusic et al. [“Attached eddy model of wall turbulence,” Annu. Rev. Fluid Mech. 51, 49-74 (2019); “The logarithmic variance of streamwise velocity and conundrum in wall turbulence,” J. Fluid Mech. 933, A8 (2022)] according to a “wall-scaled eddy model.”

Ort, förlag, år, upplaga, sidor
AIP Publishing , 2024. Vol. 36, nr 7, artikel-id 075145
Nationell ämneskategori
Strömningsmekanik
Identifikatorer
URN: urn:nbn:se:kth:diva-350948DOI: 10.1063/5.0219031ISI: 001283675600004Scopus ID: 2-s2.0-85198907099OAI: oai:DiVA.org:kth-350948DiVA, id: diva2:1885623
Anmärkning

QC 20240725

Tillgänglig från: 2024-07-24 Skapad: 2024-07-24 Senast uppdaterad: 2025-02-09Bibliografiskt granskad

Open Access i DiVA

Fulltext saknas i DiVA

Övriga länkar

Förlagets fulltextScopus

Person

Vinuesa, Ricardo

Sök vidare i DiVA

Av författaren/redaktören
Vinuesa, Ricardo
Av organisationen
Linné Flow Center, FLOWStrömningsmekanik
I samma tidskrift
Physics of fluids
Strömningsmekanik

Sök vidare utanför DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 102 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf