Experiments in Fluids

, Volume 17, Issue 1–2, pp 75–83 | Cite as

A time-resolved hot-wire shear stress probe for turbulent flow: use of laminar flow calibration

  • Y. T. Chew
  • B. C. Khoo
  • G. L. Li


A specially-designed rotating rig for producing near Couette flow was used in the calibration of a marginally elevated hot-wire shear stress probe. The probe was then used for measurements in both the turbulent boundary layer and pipe flows. Results showed that the mean wall shear stress can be accurately predicted and the near wall statistical quantities of intensity, skewness and flatness of shear stress fluctuations concurred well with previous works, thereby supporting the notion of a time-resolved shear stress probe for turbulent flows.


Boundary Layer Shear Stress Fluid Dynamics Laminar Flow Wall Shear Stress 
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List of Symbols


Calibration constant in Eq. (4)


Calibration constant in Eq. (4)


Flatness of the shear stress (or velocity) fluctuations


Calibration constant in Eq. (4)


radial coordinate


Reynolds number ( ≡ωδ2/v)


Skewness of the shear stress (or velocity) fluctuations


streamwise velocity


mean streamwise velocity


mean shear velocity,\((\overline {\mathbf{\tau }} / \rho )^{0.5} \)


height in wall units,uτy/v


vertical coordinate

Greek symbols


Gap between the top rotating disk and the bottom stationary disk


dimensionless coordinate,z/δ


kinematic viscosity




wall shear stress


mean wall shear stress


dynamic viscosity


angular velocity of the top rotating disk





independently measured quantities


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Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • Y. T. Chew
    • 1
  • B. C. Khoo
  • G. L. Li
  1. 1.Department of Mechanical & Production EngineeringNational University of SingaporeKent RidgeSingapore

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