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Effect of Near-Wall Componental Modification of Turbulence on Its Statistical Properties

  • Bettina Frohnapfel
  • Yosuke Hasegawa
  • Nobuhide Kasagi
Conference paper
Part of the Notes on Numerical Fluid Mechanics and Multidisciplinary Design book series (NNFM, volume 110)

Abstract

Turbulence control techniques are of great economical and ecological interest. In the present work a fundamental study is carried out in which body forces are introduced in the near-wall region of a turbulent channel flow and thus modify the near-wall behavior. It is investigated how these forces, which selectively act on one of the velocity components, modify near-wall turbulence and its statistical properties with the goal to extract properties that can directly be linked to the skin friction drag. The alignment between the principal axis of the Reynolds stress tensor and the mean flow direction is identified as an interesting quantity in this respect.

Keywords

Body Force Drag Reduction Reynolds Shear Stress Misalignment Angle Anisotropy Tensor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Bettina Frohnapfel
    • 1
  • Yosuke Hasegawa
    • 2
  • Nobuhide Kasagi
    • 2
  1. 1.Center of Smart InterfacesTechnical University of DarmstadtDarmstadtGermany
  2. 2.Department of Mechanical EngineeringThe University of TokyoTokyoJapan

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