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États limites et bouffées turbulentes en conduitecylindrique

Published online by Cambridge University Press:  15 September 2010

Yoann Duguet ,
A. P. Willis  and
R. R. Kerswell
Yoann Duguet*
Affiliation:
Laboratoire d’Informatique pour la Mécanique et les Sciences de l’Ingénieur (LIMSI-CNRS), UPR 325, BP 133, 91403 Orsay Cedex, France School of Mathematics, University of Bristol BS8 1TW, Bristol, UK
A. P. Willis
Affiliation:
LadHyX, École Polytechnique, 91128 Palaiseau, France School of Mathematics, University of Bristol BS8 1TW, Bristol, UK
R. R. Kerswell
Affiliation:
School of Mathematics, University of Bristol BS8 1TW, Bristol, UK
*
a Auteur pour correspondance :[email protected]
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Abstract

La transition vers la turbulence en conduite cylindrique est observée pourRe assez grand, malgre la stabilité linéaire de l’état laminaire.Expérimentalement, la transition se manifeste par le développement de boufféesturbulentes, spatialement localisées. Du côté théorique, des ondes progressives, instableset de courte longueur d’onde, ont été mises en évidence numériquement. Cette étude, quiutilise la simulation numérique directe ainsi qu’un modèle réduit, suggère lacompatibilité entre les deux approches.

Keywords

Transitionturbulenceconduite cylindriquefrontière laminaire-turbulentétat limiteTransitionturbulencepipe flowlaminar-turbulent boundaryedge state
Type
Research Article
Information
Mechanics & Industry , Volume 11 , Issue 2 , March 2010 , pp. 157 - 162
Copyright
© AFM, EDP Sciences 2010

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