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Boundary Layer Separation Under Strong Adverse Pressure Gradient over Smooth and Rough Walls

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Direct and Large-Eddy Simulation X

Part of the book series: ERCOFTAC Series ((ERCO,volume 24))

Abstract

Large eddy simulations of separated turbulent boundary layers over a flat plate were performed to study the effects of wall roughness. Rough-wall cases have a larger separation bubble with both earlier separation and later reattachment. Roughness leads to early flow reversal upstream of the real separation.

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Acknowledgements

Support from Hydro Québec, the Natural Science and Engineering Research Council of Canada (NSERC), and the High Performance Computing Virtual Laboratory (HPCVL), Queen’s University site, is gratefully acknowledged.

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Correspondence to Ugo Piomelli .

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Mottaghian, P., Yuan, J., Piomelli, U. (2018). Boundary Layer Separation Under Strong Adverse Pressure Gradient over Smooth and Rough Walls. In: Grigoriadis, D., Geurts, B., Kuerten, H., Fröhlich, J., Armenio, V. (eds) Direct and Large-Eddy Simulation X. ERCOFTAC Series, vol 24. Springer, Cham. https://doi.org/10.1007/978-3-319-63212-4_21

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  • DOI: https://doi.org/10.1007/978-3-319-63212-4_21

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-63211-7

  • Online ISBN: 978-3-319-63212-4

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