Advertisement

Rough Wall Skin Friction Measurements Using a High Resolution Surface Balance

  • Per-Åge Krogstad
  • Vladislav Efros
Conference paper
Part of the IUTAM Bookseries book series (IUTAMBOOK, volume 22)

Abstract

This paper describes the design of a floating element friction balance which is based upon a commercially available micro force balance. The balance has a perfectly linear calibration function and was successfully applied to rough wall flows in a channel and a diffusor. Extrapolation of the turbulent shear stress measured by two component LDA to the wall matched exactly the shear stress measured using the friction balance. Also, the wall shear stress obtained from the balance in the fully developed channel flow agreed with the stress that could be derived from the pressure gradient to within 3%.

Keywords

Wall Shear Stress Adverse Pressure Gradient Rough Wall Laser Doppler Velocimeter Friction Balance 
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.

References

  1. 1.
    P.-Å. Krogstad, R.A. Antonia, L.W.B. Browne, Comparison between rough- and smooth-wall turbulent boundary layers. J. Fluid Mech.245, 599–617 (1992)CrossRefGoogle Scholar
  2. 2.
    P.-Å. Krogstad, R.A. Antonia, Surface roughness effects in turbulent boundary layers. Exp. Fluids27, 450–460 (1999)CrossRefGoogle Scholar
  3. 3.
    L. Keirsbulck, L. Labraga, A. Mazouz, C. Tournier, Surface roughness effects on turbulent boundary layer structure. J. Fluids Eng.124, 127–135 (2002)CrossRefGoogle Scholar
  4. 4.
    M.F. Tachie, D.J. Bergstrom, R. Balachandar, Roughness effects in low-Reθopen-channel turbulent boundary layers. Exp. Fluids35, 338 (2003)CrossRefGoogle Scholar
  5. 5.
    K.A. Flack, M.P. Schulz, T.A. Shapiro, Experimental support for Townsends Reynolds number similarity. Phys. Fluids 035102 (2005)Google Scholar
  6. 6.
    Y. Wu, K.T. Christensen, Outer-layer similarity in the presence of a practical rough-wall topography. Phys. Fluids19, 085108 (2007)CrossRefGoogle Scholar
  7. 7.
    S.-H. Lee, H.J. Sung, Direct numerical simulation of the turbulent boundary layer with rod-roughened wall. J. Fluids Eng.584, 125–146 (2007)zbMATHGoogle Scholar
  8. 8.
    P.-Å. Krogstad, H.I. Andersson, O.M. Bakken, A. Ashrafian, An experimental and numerical study of channel flow with rough walls. J. Fluid Mech.530, 327–352 (2005)zbMATHCrossRefGoogle Scholar
  9. 9.
    P.E. Skåre, P.-Å. Krogstad, A turbulent equilibrium boundary layer near separation. J. Fluid Mech.272, 319–348 (1994)CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.The Norwegian University of Science and TechnologyTrondheimNorway

Personalised recommendations