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Decomposition of th...
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Fan, YitongShanghai Jiao Tong Univ, Sch Aeronaut & Astronaut, Shanghai 200240, Peoples R China.
(författare)
Decomposition of the mean friction drag in adverse-pressure-gradient turbulent boundary layers
- Artikel/kapitelEngelska2020
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American Physical Society (APS),2020
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LIBRIS-ID:oai:DiVA.org:kth-287416
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-287416URI
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https://doi.org/10.1103/PhysRevFluids.5.114608DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:art swepub-publicationtype
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QC 20201215
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In this study, we exploit the Renard-Deck identity [J. Fluid Mech. 790, 339 (2016)] to decompose the mean friction drag in adverse-pressure-gradient turbulent boundary layers (APG-TBLs) into three components, associated with viscous dissipation, turbulence kinetic energy production, and spatial growth of the flow, respectively. We consider adverse-pressure-gradient turbulent boundary layers developing on flat plates and airfoils, with friction Reynolds numbers in the range 200 < Re-tau < 2000, and with Rotta-Clauser pressure-gradient parameters (beta) ranging from 0 to 50. The effects of Reynolds number, adverse pressure gradient, and the pressure-gradient history on the contributing components are individually investigated, and special attention is paid to the comparisons with zero-pressure-gradient turbulent boundary layers (ZPG-TBLs). Our results indicate that the inner peaks of the dissipation and production terms are located at y(+) approximate to 6 and y(+) approximate to 16.5, respectively, and their outer peaks scale with the 99% boundary-layer thickness (delta(99)), i.e., y/delta(99) approximate to 0.7 and 0.53, respectively. These results are independent of the friction Reynolds number, the magnitude of beta, and its development history. Moreover, the spatial-growth component is negative in the investigated APG-TBLs, and its magnitude increases with beta.
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Li, WeipengShanghai Jiao Tong Univ, Sch Aeronaut & Astronaut, Shanghai 200240, Peoples R China.
(författare)
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Atzori, Marco,1992-KTH,Strömningsmekanik och Teknisk Akustik,SimEx FLOW(Swepub:kth)u1zw21kp
(författare)
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Pozuelo, RamonKTH,Teknisk mekanik,SimEx FLOW(Swepub:kth)u15es5iw
(författare)
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Schlatter, PhilippKTH,Strömningsmekanik och Teknisk Akustik(Swepub:kth)u18wf7mg
(författare)
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Vinuesa, RicardoKTH,Strömningsmekanik och Teknisk Akustik,SimEx FLOW(Swepub:kth)u12xffui
(författare)
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Shanghai Jiao Tong Univ, Sch Aeronaut & Astronaut, Shanghai 200240, Peoples R China.Strömningsmekanik och Teknisk Akustik
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Physical Review Fluids: American Physical Society (APS)5:112469-990X
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