Determination of wall shear stress from the measured velocity profile in the external part of a boundary layer
Abstract
The modified Clauser method (1954) based on either a set of Thompson profiles or on Cowl's wake law, is proposed for determining wall shear stress. For the case of Thompson's twoparameter profile, the initial data are the measured velocity profile and the displacement thickness value, calculated from measured results. The shear stress is determined iteratively by a comparison of calculated and measured velocity values. The comparison of the velocity profiles is performed for the external part of the boundary layer. For the case of Cowl's threeparameter velocity profile, the shear stress is determined by the simultaneous solution of three equations: the wake law equation, the displacement thickness equation, and the momentum thickness equation.
 Publication:

Inzhenerno Fizicheskii Zhurnal
 Pub Date:
 May 1981
 Bibcode:
 1981InFiZ..40..787K
 Keywords:

 Anemometers;
 Boundary Layer Flow;
 Computational Fluid Dynamics;
 Shear Stress;
 Velocity Distribution;
 Wall Flow;
 Coefficient Of Friction;
 Flow Distribution;
 Fluid Mechanics and Heat Transfer