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Turbulent Skin-Friction Drag Reduction at High Reynolds Numbers

In: High Performance Computing in Science and Engineering ´16

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  • Davide Gatti

    (Karlsruhe Institute of Technology (KIT), Institute of Fluid Mechanics (ISTM))

Abstract

Direct Numerical Simulation (DNS) of turbulent channel flows at moderately high values of the Reynolds number (Re) are performed to examine how Re affects the capabilities of wall-based spanwise-forcing techniques to achieve turbulent skin-friction drag reduction. With the present new data, a relationship could be derived and validated, which predicts the amount of drag reduction at several values of Re. The present study shows that a drag reduction of nearly 30 % would still be possible for an airplane at flight Reynolds numbers thanks to the spanwise forcing.

Suggested Citation

  • Davide Gatti, 2016. "Turbulent Skin-Friction Drag Reduction at High Reynolds Numbers," Springer Books, in: Wolfgang E. Nagel & Dietmar H. Kröner & Michael M. Resch (ed.), High Performance Computing in Science and Engineering ´16, pages 389-398, Springer.
    • Handle: RePEc:spr:sprchp:978-3-319-47066-5_26
    DOI: 10.1007/978-3-319-47066-5_26
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