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Passive Scalar and Velocity Fields in a Turbulent Cylinder Near Wake

  • J. G. Chen
  • H. L. Cao
  • T. M. Zhou
  • R. A. Antonia
  • Y. ZhouEmail author
Conference paper
  • 1.6k Downloads
Part of the Lecture Notes in Mechanical Engineering book series (LNME)

Abstract

This work aims to provide an exploration of the spectral analogy between the enstrophy and the scalar dissipation rate, as well as between the passive scalar and the velocity vector fluctuations, especially in the context of the highly organized aspects that exist in the near wake. Measurements were taken in the wake of a heated circular cylinder at x/d = 10–40, with a Reynolds number of 2540. The resutls indicate that there is a reasonable analogy between the spectra corresponding to enstrophy and passive scalar dissipation rate, the small departures being caused by coherent motions. The spectral analogy between the streamwise velocity fluctuation u and the passive scalar θ is better than that between the velocity fluctuation vector q and θ. This is also closely related to the highly organised lateral velocity fluctuation v in this flow.

Keywords

Passive scalar dissipation rate Enstrophy Spectral analogy Turbulent wake 

Notes

Acknowledgments

YZ wishes to acknowledge support given to him from Research Grants Council of Shenzhen Government through grants JCYJ20120613144508935 and JCYJ20130402100505796. RAA acknowledges the support of the Australian Research Council.

References

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • J. G. Chen
    • 1
  • H. L. Cao
    • 1
  • T. M. Zhou
    • 2
  • R. A. Antonia
    • 3
  • Y. Zhou
    • 1
    Email author
  1. 1.Shenzhen Graduate SchoolHarbin Institute of TechnologyShenzhenChina
  2. 2.School of Civil, Environmental and Mining EngineeringThe University of Western AustraliaCrawleyAustralia
  3. 3.School of EngineeringUniversity of NewcastleCallaghanAustralia

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