Large-scale energy in turbulent boundary layers: Reynolds-number and pressure-gradient effects
Sanmiguel Vila C, Vinuesa R, Discetti S, Ianiro A, Schlatter P, Orlu R (2019)
Publication Type: Conference contribution
Publication year: 2019
Publisher: Springer Science and Business Media, LLC
Book Volume: 226
Pages Range: 69-74
Conference Proceedings Title: Springer Proceedings in Physics
Event location: Bertinoro, ITA
ISBN: 9783030221959
DOI: 10.1007/978-3-030-22196-6_11
Abstract
Adverse-pressure-gradient (APG) turbulent boundary layers (TBLs) are studied using hot-wire measurements which cover a Clauser pressure-gradient-parameter range up to β ≈ 2.4. Constant and non-constant β distributions with the same upstream history are studied. The pre-multiplied power-spectral density is employed to study the differences in the large-scale energy content throughout the boundary layer. Two different large-scale phenomena are identified, the first one due to the pressure gradient and the second one due to the Reynolds number; the latter is also present in high-Re ZPG TBLs. A decomposition of the streamwise velocity fluctuations using a temporal filter shows that the small-scale velocity fluctuations do not scale in APG TBL flows since the effect of the large-scale features extends up to the near-wall region.
Authors with CRIS profile
Involved external institutions
Universidad Carlos III de Madrid (UC3M)
Spain (ES)
Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH)
Sweden (SE)
Spain (ES)
Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH)
Sweden (SE)
How to cite
APA:
Sanmiguel Vila, C., Vinuesa, R., Discetti, S., Ianiro, A., Schlatter, P., & Orlu, R. (2019). Large-scale energy in turbulent boundary layers: Reynolds-number and pressure-gradient effects. In Ramis Örlü, Alessandro Talamelli, Joachim Peinke, Martin Oberlack (Eds.), Springer Proceedings in Physics (pp. 69-74). Bertinoro, ITA: Springer Science and Business Media, LLC.
MLA:
Sanmiguel Vila, Carlos, et al. "Large-scale energy in turbulent boundary layers: Reynolds-number and pressure-gradient effects." Proceedings of the 8th iTi Conference on Turbulence, 2018, Bertinoro, ITA Ed. Ramis Örlü, Alessandro Talamelli, Joachim Peinke, Martin Oberlack, Springer Science and Business Media, LLC, 2019. 69-74.
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