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Study of vortical structures in turbulent near-wall flows

type de publication      communication internationale avec actes publiés
date de publication 2009
auteur(s) Herpin Sophie; Coudert Sébastien; Foucaut Jean-Marc; Soria Julio; Stanislas Michel
  
conférence Progress in Wall Turbulence: Understanding and Modeling, Proceedings of the WALLTURB International Workshop
     dates de 21-04-2009 à 23-04-2009
     lieu Lille, France
     nom des actes Proceedings of the WALLTURB International Workshop held in Lille, France, April 21-23, 2009. M. Stanislas, J. Jimenez, I. Marusic Editors, ERCOFTAC Series vol 14, Springer
  
  Sous presse
ISBN / ISSN 978-90-481-9602-9
résumé Streamwise and spanwise vortices are investigated in a database of nearwall turbulence constituted of SPIV data of boundary layer covering a large range of Reynolds numbers (Req E [1300;18950]).The detection algorithm is based on a fit of the velocity field surrounding extrema of swirling strength to an Oseen vortex. Some statistical results on the characteristics of the vortices (radius, vorticity, convection velocity, density) are investigated, giving some new insight into the organization of near-wall turbulence.
mots clés Turbulent boundary layer SPIV Coherent structure
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