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VORTEX STRUCTURES IN A ROUGH-WALL CHANNEL FLOWAND THEIR INFLUENCE ON PASSIVE SCALAR

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Book cover IUTAM Symposium on Elementary Vortices and Coherent Structures: Significance in Turbulence Dynamics

Part of the book series: Fluid Mechanics and Its Applications ((FMIA,volume 79))

Abstract

DNSs of turbulent channel flows with one rough wall and one smooth wall are presented to show how the vorticity field depends on the shape and orientation of the roughness elements. The passive scalar is also evaluated. The high correlation coefficients between vorticity and scalar gradients, in the wall layer, emphasize that in all cases flow visualizations can be used in a laboratory to have a qualitative picture of the modifications of the high- and low-speed streaks. Joint probability density function between vorticity and scalar gradients show how the bursting events affect the scalar distribution.

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References

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Author information

Authors and Affiliations

  1. Dip. Mecc. e Aer., Università “La Sapienza”, Rome, Italy

    Paolo Orlandi & Stefano Leonardi

  2. Discipline of Mech. Eng., University of Newcastle, NSW, 2308, Australia

    Robert Anthony Antonia

Authors
  1. Paolo Orlandi
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  2. Stefano Leonardi
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  3. Robert Anthony Antonia
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Editor information

Editors and Affiliations

  1. Department of Mechanical Engineering and Science, Kyoto University, Kyoto, Japan

    SHIGEO KIDA

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© 2006 Springer

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Orlandi, P., Leonardi, S., Antonia, R.A. (2006). VORTEX STRUCTURES IN A ROUGH-WALL CHANNEL FLOWAND THEIR INFLUENCE ON PASSIVE SCALAR. In: KIDA, S. (eds) IUTAM Symposium on Elementary Vortices and Coherent Structures: Significance in Turbulence Dynamics. Fluid Mechanics and Its Applications, vol 79. Springer, Dordrecht. https://doi.org/10.1007/1-4020-4181-0_5

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  • DOI: https://doi.org/10.1007/1-4020-4181-0_5

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-1-4020-4180-8

  • Online ISBN: 978-1-4020-4181-5

  • eBook Packages: EngineeringEngineering (R0)

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