General Concepts on Structure Identification

  • J. P. Bonnet
  • J. Delville
Part of the International Centre for Mechanical Sciences book series (CISM, volume 353)


The notions of Coherent Structures and their detection in turbulent flows are introduced, and some applications in far wake flows are discussed. In a second section, considerations on the requirements for experiments in view of structure eduction are presented, in connection with techniques such as Fourier analysis and Proper Orthogonal Decomposition (POD). The third part of this talk presents two techniques used for structure detection: The Variable Integration Time Average (VITA) method and the Pattern Recognition Approach (PRA). The last part will be devoted to the presentation of some typical results obtained from applications of various CS eduction techniques on the same data measured in a plane mixing layer. The following techniques are then discussed: Pseudo-Flow-Visualisation (PFV), Proper Orthogonal Decomposition, Linear Stochastic Estimation (LSE) and some complementary techniques.


Coherent Structure Ensemble Average Strouhal Number Detector Function Turbulent Wake 
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Copyright information

© Springer-Verlag Wien 1996

Authors and Affiliations

  • J. P. Bonnet
    • 1
  • J. Delville
    • 1
  1. 1.University of PoitiersPoitiersFrance

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