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.

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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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