Coherent structures in turbulent boundary layers over an airfoil

Atzori M, Vinuesa R, Lozano-Durán A, Schlatter P (2020)

Publication Type: Conference contribution

Publication year: 2020

Publisher: Institute of Physics Publishing

Book Volume: 1522

Conference Proceedings Title: Journal of Physics: Conference Series

Event location: Madrid, ESP

DOI: 10.1088/1742-6596/1522/1/012020

Abstract

This preliminary study is concerned with the identification of three-dimensional coherent structures, defined as intense Reynolds-stress events, in the turbulent boundary layer developing over the suction side of a NACA4412 airfoil at a Reynolds number based on the chord lenght and the incoming velocity of Rec = 200, 000. The scientific interest for such flows originates from the non-uniform adverse pressure gradient that affects the boundary-layer development. Firstly, we assess different methods to identify the turbulent-non-turbulent interface, in order to exclude the irrotational region from the analysis. Secondly, we evaluate the contribution of the considered coherent structures to the enhanced wall-normal velocity, characteristic of adverse pressure gradients. Our results show that it is necessary to limit the detection of coherent structures to the turbulent region of the domain, and that the structures reveal qualitative differences between the contributions of intense events to the wall-normal velocity in adverse-pressure-gradient and zero-pressure-gradient turbulent boundary layers.

Authors with CRIS profile

Philipp Schlatter

Involved external institutions

Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH) SE Sweden (SE)

How to cite

APA:

Atzori, M., Vinuesa, R., Lozano-Durán, A., & Schlatter, P. (2020). Coherent structures in turbulent boundary layers over an airfoil. In Javier Jimenez (Eds.), Journal of Physics: Conference Series. Madrid, ESP: Institute of Physics Publishing.

MLA:

Atzori, Marco, et al. "Coherent structures in turbulent boundary layers over an airfoil." Proceedings of the 4th Madrid Summer School on Turbulence, Madrid, ESP Ed. Javier Jimenez, Institute of Physics Publishing, 2020.

BibTeX: Download