Dixit, Shivsai Ajit and Ramesh, ON (2009) Determination of skin friction in strong pressure-gradient equilibrium and near-equilibrium turbulent boundary layers. In: Experiments in fluids, 47 (6). pp. 1045-1058.
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The conventional Clauser-chart method for determination of local skin friction in zero or weak pressure-gradient turbulent boundary layer flows fails entirely in strong pressure-gradient situations. This failure occurs due to the large departure of the mean velocity profile from the universal logarithmic law upon which the conventional Clauser-chart method is based. It is possible to extend this method,even for strong pressure-gradient situations involving equilibrium or near-equilibrium turbulent boundary layers by making use of the so-called non-universal logarithmic laws. These non-universal log laws depend on the local strength of the pressure gradient and may be regarded as perturbations of the universal log law.The present paper shows that the modified Clauser-chart method, so developed, yields quit satisfactory results in terms of estimation of local skin friction in strongly accelerated or retarded equilibrium and near-equilibrium turbulent boundary layers that are not very close to relaminarization or separation.
|Item Type:||Journal Article|
|Additional Information:||copyright of this article belongs to Springer.|
|Keywords:||Velocity distribution; Reynolds-number; flow|
|Department/Centre:||Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)|
|Date Deposited:||01 Jan 2010 08:47|
|Last Modified:||19 Sep 2010 05:53|
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