Experimental Measurement of Single-Particle Dispersion in High Reynolds Number Turbulence

ORAL

Abstract

We report Lagrangian measurements of single-particle dispersion in a high Reynolds number (up to a Taylor microscale Reynolds number of $R_{\lambda} = 815$) turbulence experiment. The motion of tracer particles is followed optically in three dimensions using multiple high speed cameras. Such direct measurement is not possible from Eulerian techniques. We compare our measurements with previous experimental data, stochastic models and DNS. This work is supported by the National Science Foundation and the Max Planck Society.

*This work is supported by NSF grants PHY-9988755 and PHY-0216406 and by the Max Planck Society

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Authors

  • Kelken Chang

  • Haitao Xu

    • Cornell University
    • LASSP, Cornell University

  • Nicholas Ouellette

    • Cornell University
    • LASSP, Cornell University

  • Michael Bourgoin

    • LEGI-CNRS
    • Laboratoire des Ecoulements Geophysiques et Industriels, CNRS, France

  • Eberhard Bodenschatz

    • Max Planck Institute for Dynamics and Self-Organization
    • Max Planck Institute for Dynamics and Self-Organisation, Goettingen, Germany
    • Max Planck Institute for Dynamics and Self-Organization, Goettingen, Germany