Determination of skin friction in strong pressure-gradient equilibrium and near-equilibrium turbulent boundary layers
Data(s) |
01/12/2009
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Resumo |
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. |
Formato |
application/pdf |
Identificador |
http://eprints.iisc.ernet.in/25164/1/fulltext.pdf 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. |
Publicador |
Springer |
Relação |
http://www.springerlink.com/content/q76157m111855585/ http://eprints.iisc.ernet.in/25164/ |
Palavras-Chave | #Aerospace Engineering (Formerly, Aeronautical Engineering) |
Tipo |
Journal Article PeerReviewed |