Characterization of the massively separated wake behind a square cylinder by means of direct numerical simulation

Vinuesa R, Schlatter P, Henningson DS (2016)

Publication Type: Conference contribution

Publication year: 2016

Publisher: Springer Science and Business Media, LLC

Book Volume: 185

Pages Range: 259-266

Conference Proceedings Title: Springer Proceedings in Physics

Event location: Stockholm, SWE

ISBN: 9783319306001

DOI: 10.1007/978-3-319-30602-5_32

Abstract

The massively separated wake behind a wall-mounted square cylinder is investigated by means of direct numerical simulation (DNS). The effect of inflow conditions is assessed by considering two different cases with matching momentum thickness Reynolds numbers Reθ ≃ 1000 at the location of the cylinder: one with a fully-turbulent boundary layer as inflow condition, and another one with a laminar boundary layer. The main simulation is performed by using the spectral element code Nek5000. While in the laminar-inflow simulation the horseshoe vortex forming around the cylinder can be observed in the instantaneous flow fields, this is not the case in the turbulent-inflow simulation. Besides, the streaks in the turbulent case become greatly attenuated on both sides of the obstacle. By analyzing the Reynolds shear stress uv, we show that this is due to the modulation of the horseshoe vortex by the turbulence from the incoming boundary layer.

Authors with CRIS profile

Philipp Schlatter

Involved external institutions

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

How to cite

APA:

Vinuesa, R., Schlatter, P., & Henningson, D.S. (2016). Characterization of the massively separated wake behind a square cylinder by means of direct numerical simulation. In Antonio Segalini (Eds.), Springer Proceedings in Physics (pp. 259-266). Stockholm, SWE: Springer Science and Business Media, LLC.

MLA:

Vinuesa, Ricardo, Philipp Schlatter, and Dan S. Henningson. "Characterization of the massively separated wake behind a square cylinder by means of direct numerical simulation." Proceedings of the 5th International Conference on Jets, Wakes and Separated Flows, ICJWSF2015, Stockholm, SWE Ed. Antonio Segalini, Springer Science and Business Media, LLC, 2016. 259-266.

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