Near wall behavior of turbulence in an unsteady channel flow

M. Seddighi, S. He, A. E. Vardy, P. Orlandi

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    Abstract

    Direct Numerical Simulations (DNS) of unsteady turbulent flows in a channel accelerating uniformly from steady state are performed to study turbulence behaviour near the wall. Several steady flow simulations at various Reynolds numbers are carried out to facilitate direct comparisons between steady and unsteady behavior. It is shown that the behavior of turbulence for the streamwise velocity component in the near wall region is distinctly different from that in the core region. Moreover, the three components of the turbulent fluctuations exhibit very different characteristics reflecting the anisotropic behaviour of turbulence.
    Original languageEnglish
    Title of host publication40th AIAA Fluid Dynamics Conference
    PublisherAmerican Institute of Aeronautics and Astronautics
    ISBN (Print)978-160086745-3
    Publication statusPublished - 2010
    Event40th AIAA Fluid Dynamics Conference - Chicago, United States
    Duration: 28 Jun 20101 Jul 2010
    http://www.aerospaceamerica.org/Documents/Bulletin%20News%20%28Individual%20files%29/March%202010/MeetingsProgram.pdf

    Conference

    Conference40th AIAA Fluid Dynamics Conference
    CountryUnited States
    CityChicago
    Period28/06/101/07/10
    Internet address

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    Cite this

    Seddighi, M., He, S., Vardy, A. E., & Orlandi, P. (2010). Near wall behavior of turbulence in an unsteady channel flow. In 40th AIAA Fluid Dynamics Conference American Institute of Aeronautics and Astronautics.