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IUTAM Symposium on Simulation and Identification of Organized Structures in Flows

Proceedings of the IUTAM Symposium held in Lyngby, Denmark, 25–29 May 1997

  • J. N. Sørensen
  • E. J. Hopfinger
  • N. Aubry

Part of the Fluid Mechanics and Its Applications book series (FMIA, volume 52)

Table of contents

  1. Front Matter
    Pages i-xiv
  2. Flow Control

  3. Coherent Structures in Wall-Bounded Flows

    1. Front Matter
      Pages 39-39
    2. Javier Jimenez, Alfredo Pinelli
      Pages 41-49
  4. Rotating Flows

    1. Front Matter
      Pages 79-79
    2. H. I. Andersson
      Pages 81-90
    3. L. Lollini, C. Cambon, M. Michard, L. Graftieaux
      Pages 91-100
    4. E. A. Christensen, N. Aubry, J. N. Sørensen
      Pages 101-108
    5. J. A. Van De Konijnenberg, A. H. Nielsen, R. De Nijs, J. Juul Rasmussen, B. Stenum
      Pages 119-128
  5. Small Scale Turbulence and 2-D Flows

    1. Front Matter
      Pages 129-129
    2. M. Tanahashi, T. Miyauchi, J. Ikeda
      Pages 131-140
    3. I. Hosokawa, K. Yamamoto
      Pages 141-149
    4. J. R. Angilella, J. C. Vassilicos
      Pages 151-160
  6. Geostrophic and Stratified Flows

    1. Front Matter
      Pages 161-161
    2. G. R. Spedding
      Pages 163-179
    3. Xavier J. Carton, Stéphanie M. Corréard
      Pages 181-190
    4. Stéphanie M. Corréard, Xavier J. Carton
      Pages 191-200
    5. Frédéric O. Vandermeirsch, Xavier J. Carton, Yves G. Morel
      Pages 201-210
  7. Topological Aspects

  8. Experimental Techniques

    1. Front Matter
      Pages 259-259
    2. S. Aubrun, H. Ha Minh, H. Boisson, P. Carles, J. Coulomb
      Pages 261-271
    3. P. G. Esposito, T. Zhou, R. A. Antonia, P. Orlandi
      Pages 289-297
    4. D. S. Nobes, G. J. R. Newbold, Z. T. Alwahabi
      Pages 299-308
  9. Vortical Structures

  10. POD, LSE and Other Techniques

  11. Low-Dimensional Modelling

    1. Front Matter
      Pages 431-431
    2. R. Lardat, A. Dulieu, W. Z. Shen, L. Ta Phuoc, C. Tenaud, L. Cordier et al.
      Pages 447-456

About these proceedings

Introduction

The dynamics of transitional and turbulent flows is often dominated by organized structures with a life-time much longer than a characteristic time­ scale of the surrounding small-scale turbulence. Organized structures may appear as secondary flows as a result of an instability but they persist in turbulent flows. They manifest themselves as eddies or localized vortices and play an important role in e.g. mixing and transport processes. Al­ though the existence of organized structures has been revealed by many experiments and by numerical simulations they are somewhat elusive, as there is no consensus on how to define them and technically how to detect them. In recent years several identification tools for analysing complex flows have been developed. These tools include various versions of the Proper Orthog­ onal Decomposition (POD) technique, wavelet transforms, pattern recogni­ tion, etc. At the same time, improvements in experimental techniques have made available data that further necessitate efficient detection methods. A prominent example is the Particle Image Velocimetry (PIV) technique from which complex spatio-temporal flow data can be obtained. An interesting feature of some of the identification techniques is that they form the basis for reduced models by which dynamical processes can be studied in details. From studies of dissipative dynamical systems it has been revealed that, in phase space, transitional and turbulent flows can be identified by their low-dimensional behaviour. Thus, employing data from experiments or nu­ merical simulations to form modes residing on finite-dimensional attractors may dramatically reduce computing costs.

Keywords

dynamics mixing stability topology turbulence turbulent flow vortices

Editors and affiliations

  • J. N. Sørensen
    • 1
  • E. J. Hopfinger
    • 2
  • N. Aubry
    • 3
  1. 1.Department of Energy EngineeringTechnical University of DenmarkLyngbyDenmark
  2. 2.LEGI-IMGDomaine UniversitaireGrenobleFrance
  3. 3.Mechanical Engineering DepartmentNew Jersey Institute of TechnologyNewarkUSA

Bibliographic information

  • DOI https://doi.org/10.1007/978-94-011-4601-2
  • Copyright Information Kluwer Academic Publishers 1999
  • Publisher Name Springer, Dordrecht
  • eBook Packages Springer Book Archive
  • Print ISBN 978-94-010-5944-2
  • Online ISBN 978-94-011-4601-2
  • Series Print ISSN 0926-5112
  • Buy this book on publisher's site