Streamwise and Radial Decomposition of a Turbulent Axisymmetric Jet

  • Maja WänströmEmail author
  • William K. George
  • K. E. Meyer
Part of the Springer Proceedings in Physics book series (SPPHY, volume 141)


Planar PIV was used to acquired 10, 000 independent samples of the far field of a free, turbulent round air jet flow of exit Reynolds number 20,000. The objective was to test the two-point similarity theory of Ewing et al. [1]. After applying the similarity mapping, two-point velocity correlation analysis showed independence of streamwise origin, confirming the hypothesized streamwise homogeneity in two-point similarity coordinates. The velocity data was subsequently spatially decomposed by applying Fourier transformation in the ‘homogenized’ streamwise direction and POD to obtain orthogonal basis functions in the radial direction.


Particle Image Velocimetry Centerline Velocity Downstream Position Virtual Origin Orthogonal Basis Function 
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  1. 1.
    Ewing, D., Frohnapfel, B., George, W.K., Pedersen, J.M., Westerweel, J.: Two-point similarity in the round jet. Journal of Fluid Mechanics 557, 309–330 (2007)MathSciNetCrossRefGoogle Scholar
  2. 2.
    Wänström, M.: Spatial Decompositions of a Fully Developed Turbulent Jet Sampled with Particle Image Velocimetry. Ph.D. diss., Chalmers U. of Tech., Gothenburg, Sweden (2009),

Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Maja Wänström
    • 1
    Email author
  • William K. George
    • 2
  • K. E. Meyer
    • 3
  1. 1.Swedish Energy AgencyEskilstunaSweden
  2. 2.EC Lille, LMLU. Lille Nord de FranceVilleneuve d AscqFrance
  3. 3.Dept. Mech. Engr.Technical University of DenmarkLyngbyDK

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