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The structure of a statistically steady turbulent boundary layer near a free-slip surface

Campagne, Gaëlle and Cazalbou, Jean-Bernard and Joly, Laurent and Chassaing, Patrick The structure of a statistically steady turbulent boundary layer near a free-slip surface. (2009) Physics of Fluids, vol. 2 (n° 6). pp. 065111-1. ISSN 1070-6631

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Official URL: http://dx.doi.org/10.1063/1.3156014

Abstract

The interaction between a free-slip surface with unsheared but sustained turbulence is investigated in a series of direct numerical simulations. By changing (i) the distance between the (plane) source of turbulence and the surface, and (ii) the value of the viscosity, a set of five different data sets has been obtained in which the value of the Reynolds-number varies by a factor of 4. The observed structure of the interaction layer is in agreement with current knowledge, being made of three embedded sublayers: a blockage layer, a slip layer, and a Kolmogorov layer. Practical measures of the different thicknesses are proposed that lead to a new Reynolds-number scaling based on easy-to-evaluate surface quantities. This scaling is consistent with previous proposals but makes easier the comparison between free-surface flows when they differ by the characteristics of the distant turbulent field. Its use will be straightforward in a turbulence-modeling framework.

Item Type:Article
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
French research institutions > Centre National de la Recherche Scientifique - CNRS
Other partners > Swansea University (UNITED KINGDOM)
Laboratory name:
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Deposited By: J.-B. Cazalbou
Deposited On:03 Jul 2009 15:52

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