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Influence of the Shape on the Roughness-Induced Transition

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Instability and Control of Massively Separated Flows

Part of the book series: Fluid Mechanics and Its Applications ((FMIA,volume 107))

Abstract

Global instability analysis of the three-dimensional flow past two roughness elements of different shape, namely a cylinder and a bump, is presented. In both cases, the eigenspectrum is made of modes characterised by a varicose symmetry and localised mostly in the zones of large base flow shear. The primary instability exhibited is the same in both cases and consists in an isolated unstable mode probably related to streaks instability. For the cylinder however, a whole branch of modes is in addition destabilised as the Reynolds number is further increased.

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Author information

Authors and Affiliations

  1. Laboratoire DynFluid, Arts et Métiers ParisTech, 151, Bd. de l’Hopital, 75013, Paris, France

    J.-Ch. Loiseau, S. Cherubini & J.-Ch. Robinet

  2. Laboratoire de Mécanique de Lille, Université Lille-1, Boulevard Paul Langevin, 59655, Villeneuve d’Ascq, France

    E. Leriche

Authors
  1. J.-Ch. Loiseau
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  2. S. Cherubini
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  3. J.-Ch. Robinet
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  4. E. Leriche
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Corresponding author

Correspondence to J.-Ch. Loiseau .

Editor information

Editors and Affiliations

  1. School of Aerospace Engineering, Technical University of Madrid, Madrid, Spain

    Vassilis Theofilis

  2. Department of Mechanical and Aerospace Engineering, Monash University, Melbourne, VIC, Australia, and Department of Aeronautical Engineering, King Abdulaziz University, Jeddah, Saudi Arabia

    Julio Soria

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© 2015 Springer International Publishing Switzerland

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Loiseau, JC., Cherubini, S., Robinet, JC., Leriche, E. (2015). Influence of the Shape on the Roughness-Induced Transition. In: Theofilis, V., Soria, J. (eds) Instability and Control of Massively Separated Flows. Fluid Mechanics and Its Applications, vol 107. Springer, Cham. https://doi.org/10.1007/978-3-319-06260-0_18

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  • DOI: https://doi.org/10.1007/978-3-319-06260-0_18

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-319-06259-4

  • Online ISBN: 978-3-319-06260-0

  • eBook Packages: EngineeringEngineering (R0)

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