Measurement of Flow Structures in a Turbulent Boundary Layer

  • J. Westerweel
  • J. G. Th. Van Der Hoeven
  • M. M. Van Aarssen
Conference paper
Part of the Fluid Mechanics and its Applications book series (FMIA, volume 36)

Abstract

It is conjectured that riblet surfaces effect a drag reduction by organizing the structure of a turbulent flow in the near-wall region of a turbulent boundary layer. However, direct experimental observation is inconclusive, as these are based on single-point measurement probes (like LDV) or qualitative observations with conventional flow visualization. Digital particle image velocimetry (DPIV) is a measurement technique that yields quantitative information of the instantaneous velocity field in a planar cross-section of the flow, and it is especially useful for the investigation of flow structures. We therefore decided to use this technique to make a quantitative investigation of the flow structures in a boundary layer over smooth and riblet surfaces.

Keywords

Particle Image Velocimetry Turbulent Boundary Layer Drag Reduction Streamwise Velocity Measurement Plane 
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

  1. Westerweel, J., Draad, A.A., van der Hoeven, J.G. Th. and van Oord,. J. (1996) Measurement of fully-developed turbulent pipe flow with digital particle image velocimetry, Fxp. Fluids, Vol. no. 20, pp. 165–177Google Scholar

Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • J. Westerweel
    • 1
  • J. G. Th. Van Der Hoeven
    • 1
  • M. M. Van Aarssen
    • 1
  1. 1.Laboratory for Aero and HydrodynamicsDelft University of TechnologyDelftThe Netherlands

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