Experiments in Fluids

, Volume 35, Issue 5, pp 389–396 | Cite as

Evaluation of three techniques for wall-shear measurements in three-dimensional flows

  • J. D. Ruedi
  • H. Nagib
  • J. Österlund
  • P. A. Monkewitz
Original Paper


Recent improvements in three techniques for measuring skin friction in two- and three-dimensional turbulent wall-bounded shear flows are presented. The techniques are: oil-film interferometry, hot wires mounted near the wall, and surface hot-film sensors based on MEMS technology. First, we demonstrate that the oil-film interferometry technique can be used to measure the skin-friction magnitude and its direction in two- and three-dimensional wall-bounded shear flows. Second, a simple method is outlined to measure the skin friction with a wall wire located outside of the viscous sublayer. Finally, a systematic study of the parameters influencing wall-friction measurements with MEMS sensors is presented. The results demonstrate that accurate measurements of the mean skin friction with MEMS sensors are possible in two- and three-dimensional wall flows. Measurements by the three techniques are compared to each other and to past measurements in the same facility.



This work was funded by the Swiss Federal Office for Education and Science (OFES) under contract BBWN2.97.0294. The present study was also part of the European project AEROMEMS, contract BRPR-CT97–0573, which investigates the feasibility of using MEMS technology for boundary layer control on aircraft. The contributions of the second author were supported by the Air Force Office of Scientific Research, USAF, under grant number F49620–01–1-0445, and ERCOFTAC.


  1. Bruns JM, Fernholz HH, Monkewitz PA (1999) An experimental investigation of a three-dimensional turbulent boundary layer in an S-shaped duct. J Fluid Mech 393:175–213CrossRefGoogle Scholar
  2. Bruns JM (1998) Experimental investigation of a three-dimensional turbulent boundary layer in an S-shaped duct. Verlag Dr. Köster, Berlin Google Scholar
  3. Fernholz HH, Janke G, Schober M, Wagner PM, Warnack D (1996) New developments and applications of skin-friction measuring techniques. Meas Sci Technol 7:1396–1409CrossRefGoogle Scholar
  4. Fernholz HH, Warnack D (1998) The effects of a favourable pressure gradient and of the Reynolds number on an incompressible axisymmetric turbulent boundary layer. 1. The turbulent boundary layer. J Fluid Mech 359:329–356CrossRefGoogle Scholar
  5. Hanratty TJ, Campbell J A (1983) Measurement of wall shear stress. In: Fluid mechanics measurements. Hemisphere, New York, pp 559–615Google Scholar
  6. Haritonidis JH (1989) Measurement of wall shear stress. In: Advances in fluid mechanics measurements. Springer, Berlin Heidelberg New York, pp 229–261Google Scholar
  7. Ho CM, Tai YC (1998) Micro-electro-mechanical-systems (MEMS) and fluid flows. Ann Rev Fluid Mech 30:579–612CrossRefGoogle Scholar
  8. Janke G (1994) Über die Grundlagen und einige Anwendungen der ölfilm-interferometrie zur Messung von Wandreibungsfeldern in Luftstromungen. Technische Universitat BerlinGoogle Scholar
  9. Jiang F, Tai YC, Gupta B, Goodman R, Tung S, Huang JB, Ho CM (1996) Surface-micromachined shear stress imager. In: Micro electro mechanical systems workshop (MEMS96). IEEE, New York, pp 110–115Google Scholar
  10. Jiang F, Tai YC, Walsh K, Tsao T, Lee GB, Ho CH (1997) A flexible MEMS technology and its first application to shear stress sensors. In: Micro electro mechanical systems workshop (MEMS97). IEEE, New York, pp 465–470Google Scholar
  11. Nishizawa N, Marusic I, Perry AE, Hornung HG (1998) Measurement of wall shear stress in turbulent boundary layers using an optical interferometry method. In: 13th Australian fluid mechanics conference, Monash University, Melbourne, AustraliaGoogle Scholar
  12. Österlund J (1999) Experimental studies of zero pressure-gradient turbulent boundary layer flow. KTH, StockholmGoogle Scholar
  13. Seto J, Hornung HG (1993) Two-directional skin friction measurement utilizing a compact internally-mounted thin-liquid-film skin friction meter. AIAA paper 93–0180Google Scholar
  14. Tanner LH, Blows LG (1976) A study of the motion of oil films on surfaces in air flow, with application to the measurement of skin friction. J Phys E 9:194–202CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  • J. D. Ruedi
    • 1
    • 4
  • H. Nagib
    • 2
  • J. Österlund
    • 3
  • P. A. Monkewitz
    • 1
  1. 1.Laboratory of Fluid MechanicsEPFLLausanneSwitzerland
  2. 2.IITChicagoUSA
  3. 3.FOI/FFAStockholmSweden
  4. 4.SLFDavos DorfSwitzerland

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