Abstract
The turbulent quasi-periodic wake of a circular and a square cross-section cantilevered finite aspect ratio cylinder protruding a thin laminar boundary layer is investigated experimentally. The mean wake vortical structure and flow topology are found to be more complex for the square than the circular geometry. The differences arise from interactions involving periodically shed Kármán-like vortices. For the square cylinder, the circulation of the shed vortices is significantly stronger, giving rise to more complex interactions between shed vortices and the redeveloping boundary layer. The strength of the shed vortices is related to the rate vorticity, generated on the obstacle faces, is transported along the separated shear layers. The obstacle surface topology thus plays an important role by modifying the separation process.
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References
H. Hornung, A.E. Perry, Some aspects of three-dimensional separation, part I: streamsurface bifurcations. Zeit. Flug. Weltraumforsh. 8, 77–87 (1984)
M.G. Kindree, M. Shahroodi, R.J. Martinuzzi, Low-frequency dynamics in the turbulent wake of cantilevered square and circular cylinders protruding a thin laminar boundary layer. Exp. Fluids 59, 186 (2018)
J.A. Bourgeois, B.R. Noack, R.J. Martinuzzi, Generalized phase average with applications to sensor-based flow estimation of the wall-mounted square cylinder wake. J. Fluid Mech. 736, 316–350 (2013)
D. Zhang, L. Chang, H. An, M. Zhao, Direct numerical simulation of flow around a surface-mounted finite square cylinder at low Reynolds numbers. Phys. Fluids 29, 045101 (2017)
Acknowledgements
We thank the financial support of the Natural Sciences and Engineering Research Council of Canada through the Discovery Grant and Research Tools & Equipment programs.
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Kindree, M.G., Yan, D., Martinuzzi, R.J. (2021). Topological Differences in Mean Wakes of Circular and Square Cantilevered Cylinders. In: Örlü, R., Talamelli, A., Peinke, J., Oberlack, M. (eds) Progress in Turbulence IX. iTi 2021. Springer Proceedings in Physics, vol 267. Springer, Cham. https://doi.org/10.1007/978-3-030-80716-0_27
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DOI: https://doi.org/10.1007/978-3-030-80716-0_27
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