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Coherent Structures in Turbulent Flow over Arrays of Cubical Obstacles

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IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls

Part of the book series: IUTAM Bookseries ((IUTAMBOOK,volume 22))

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Abstract

The organised motion in turbulent flows over arrays of cubical obstacles has been investigated using direct numerical simulations. Six plan densities have been examined in detail. Relative to a smooth surface, the streamwise extent of the near-wall structures is decreased while their spanwise and wall normal extent is increased. Near the crests’ plane, the inclination of the average structure is larger than that over a smooth wall. The Reynolds stress anisotropy tensor and its invariants show a closer approach to isotropy over the rough wall than over a smooth wall. The mechanism leading to increased isotropy has been explained in the paper through consideration of the Reynolds stress budgets.

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Acknowledgements

This research was supported in part by the National Science Foundation through TeraGrid resources provided by TACC and in part by the UK Turbulence Consortium during SL’s visits to Southampton.

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Authors and Affiliations

  1. Department of Mechanical Engineering, University of Puerto Rico at Mayaguez, Mayagüez, USA

    Stefano Leonardi

  2. School of Engineering Sciences, University of Southampton, Southampton, UK

    Ian Castro

Authors
  1. Stefano Leonardi
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  2. Ian Castro
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Corresponding author

Correspondence to Ian Castro .

Editor information

Editors and Affiliations

  1. Dept. Engineering, University of Cambridge, Trumpington Street, Cambridge, CB2 1PZ, United Kingdom

    T. B. Nickels

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Leonardi, S., Castro, I. (2010). Coherent Structures in Turbulent Flow over Arrays of Cubical Obstacles. In: Nickels, T. (eds) IUTAM Symposium on The Physics of Wall-Bounded Turbulent Flows on Rough Walls. IUTAM Bookseries, vol 22. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-9631-9_22

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  • DOI: https://doi.org/10.1007/978-90-481-9631-9_22

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  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-90-481-9630-2

  • Online ISBN: 978-90-481-9631-9

  • eBook Packages: EngineeringEngineering (R0)

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