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Analysis of the wake–mixing-layer interaction using multiple plane PIV and 3D classical POD

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Abstract

The strong interaction between turbulent structures arising from a plane mixing layer impinging on a circular cylinder is studied. This complex flow has been investigated by a set-up called “dual-plane” PIV that uses two 2D PIV (two-dimensional particle image velocimetry) planes acquired simultaneously. This approach allowed us to apply a 3D-POD (three-dimensional proper orthogonal decomposition) treatment. The first POD modes show the main footprint of the flow configuration, which comprises oblique structures associated with the action of the mixing layer on the near wake. The present study suggests, by analogy, that this phenomenon behaves like the dislocation observed in uniform wake flows.

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Notes

  1. St=(fδ w )/U c and f=U c /λ (Taylor hypothesis)

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Acknowledgements

C.B. acknowledges support from the region of Poitou Charente, France.

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Authors and Affiliations

  1. L.E.A. (Laboratoire d’Etudes Aérodynamiques), UMR CNRS 6609, CEAT, 43 Route de l’Aérodrome, 86036, Poitiers, France

    C. Braud, P. Braud & J. Delville

  2. CEMAGREF, 17 avenue de Cucillé, 35044 cedex, Rennes, France

    C. Braud, D. Heitz & G. Arroyo

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  1. C. Braud
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  2. D. Heitz
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  3. P. Braud
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  4. G. Arroyo
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  5. J. Delville
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Correspondence to C. Braud.

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Braud, C., Heitz, D., Braud, P. et al. Analysis of the wake–mixing-layer interaction using multiple plane PIV and 3D classical POD. Exp Fluids 37, 95–104 (2004). https://doi.org/10.1007/s00348-004-0789-z

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  • DOI: https://doi.org/10.1007/s00348-004-0789-z

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