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)


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%.


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

© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  1. 1.The Norwegian University of Science and TechnologyTrondheimNorway

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