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Experiments in Fluids

, Volume 41, Issue 1, pp 35–55 | Cite as

Automatic eduction and statistical analysis of coherent structures in the wall region of a confined plane turbulent impinging jet

  • M. PavageauEmail author
  • K. Loubière
  • S. Gupta
Research Article

Abstract

This paper describes a vortex detection algorithm used to expose and statistically characterize the coherent flow patterns observable in the velocity vector fields measured by particle image velocimetry in the impingement region of air curtains. The philosophy and the architecture of this algorithm are presented. Its strengths and weaknesses are discussed. The results of a parametrical analysis performed to assess the variability of the response of our algorithm to the three user-specified parameters in our eduction scheme are reviewed. The technique is illustrated in the case of a plane turbulent impinging twin-jet with an opening ratio of 10. The corresponding jet Reynolds number, based on the initial mean flow velocity U 0 and the jet width e, is 14,000. The results of a statistical analysis of the size, shape, spatial distribution and energetic content of the coherent eddy structures detected in the impingement region of this test flow are provided. Although many questions remain open, new insights into the way these structures might form, organise and evolve are given. Relevant results provide an original picture of the plane turbulent impinging jet.

Keywords

Vortex Particle Image Velocimetry Coherent Structure Vortex Core Particle Image Velocimetry Measurement 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

The work presented in this paper was supported by the CNRS, the EMN and the French Embassy in New Delhi (India) in the form of Post-doctoral and PhD grants. It could not have been completed without the assistance of the technical staff of our laboratory. We thank, in particular, Mr Y. Gouriou, Mr F.X. Blanchet and Mr E. Chevrel for their valuable and unstinting help in the construction and instrumentation of the experimental facility designed for this work.

References

  1. Adrian RJ, Christensen KT, Liu ZC (2000) Analysis and interpretation of instantaneous turbulent velocity fields. Exp Fluids 29:275–290CrossRefGoogle Scholar
  2. Agrawal A, Prasad AK (2002a) Properties of vortices in the self-similar turbulent jet. Exp Fluids 33:565–577Google Scholar
  3. Agrawal A, Prasad AK (2002b) Organizational modes of large-scale vortices in an axisymmetric turbulent jet. Flow Turbul Combust 68:359–377CrossRefzbMATHGoogle Scholar
  4. Agrawal A, Prasad AK (2003) Measurements within vortex cores in a turbulent jet. J Fluids Eng 125:561–568CrossRefGoogle Scholar
  5. Antonia RA, Satyaprakash BR, Hussain AKMF (1980) Measurements of dissipation rate and some other characteristics of turbulent plane and circular jets. Phys Fluids 23(4):695–700CrossRefGoogle Scholar
  6. Beaubert F (2002) Simulation des grandes échelles turbulentes d’un jet plan en impact. PhD Report No ED 0367-042, Université de NantesGoogle Scholar
  7. Beaubert F, Viazzo S (2003) Large eddy simulation of plane turbulent impinging jets at moderate Reynolds numbers. Int J Heat Fluid Flow 24:512–519CrossRefGoogle Scholar
  8. Bonnet JP, Delville J (2002) Coherent structures in turbulent flows and numerical simulations approaches. Von Karman Institute for fluid dynamics lecture series 2002–04 on post-processing of experimental and numerical data, April 22–26Google Scholar
  9. Bonnet JP, Delville J, Glausner MN, Antonia RA, Bisset DK, Cole DR, Fiedler HE, Garem JH, Hilberg D, Jeong J, Kevlahan NKR, Ukeiley LS, Vincendeau E (1998) Collaborative testing of eddy structure identification methods in free turbulent shear flows. Exp Fluids 25:197–225CrossRefGoogle Scholar
  10. Chassaing P (2000) Turbulence en mécanique des fluides: Analyse du phénomène en vue de sa modélisation à l’usage de l’ingénieur. Collection Polytech INP Toulouse-Cépaduès EditionsGoogle Scholar
  11. Geers LFG, Tummers MJ, Hanjalic K (2005) Particle imaging velocimetry-based identification of coherent structures in normally impinging multiple jets. Phys Fluids 17:055105, 1–13Google Scholar
  12. Gupta S (2005) Etude expérimentale du comportement dynamique et des performances de rideaux d’air en vue de la conception de systèmes de confinement cellulaires. PhD Report No ED 0367-174, Université de NantesGoogle Scholar
  13. Hsiao FB, Huang JM (1994) On the dynamics of flow structure development in an excited plane jet. Trans ASME 116:714–720Google Scholar
  14. Hussain F (1986) Coherent structures and turbulence. J Fluid Mech 173:303–356CrossRefGoogle Scholar
  15. Jeong J, Hussain F (1995) On the identification of a vortex. J Fluid Mech 285:69–94CrossRefzbMATHMathSciNetGoogle Scholar
  16. Lesieur M (1990) Turbulence in fluids. Kluwer editions, DordrechtGoogle Scholar
  17. Loubière K, Pavageau M (2006) Educing coherent eddy structures in air curtain systems. Chem Eng and Proc (in press)Google Scholar
  18. Lyell MJ, Huerre P (1985) Linear and nonlinear stability of plane stagnation flow. J Fluid Mech 161:295–312CrossRefzbMATHMathSciNetGoogle Scholar
  19. Maurel S, Solliec C (2001) A turbulent plane jet impinging nearby and far from a flat plate. Exp Fluids 31:687–696CrossRefGoogle Scholar
  20. Maurel S, Rey C, Solliec C, Pavageau M (2004) Caractéristiques structurelles d’un jet d’air plan turbulent frappant une plaque plane placée à distance variable. Mécanique Industries 5:317–329CrossRefGoogle Scholar
  21. Najjar FM, Tafti DK (1996) Study of discrete test filters and numerical approximations for the dynamic subgrid-scale stress model in turbulent channel flow simulations. Phys Fluids 8(4):1076–1088CrossRefzbMATHGoogle Scholar
  22. Rajagopalan S, Antonia RA (1998) Turbulence reduction in the mixing layer of a plane jet using small cylinders. Exp Fluids 25:86–103CrossRefGoogle Scholar
  23. Rajagopalan S, Ko NWM (1996) Velocity and spanwise vorticity measurements in an excited mixing layer of a plane jet. Exp Fluids 20:346–357CrossRefGoogle Scholar
  24. Robinson SK (1991) Coherent motion in the turbulent boundary layer. Annu Rev Fluid Mech 23:601–639CrossRefGoogle Scholar
  25. Robinson SK, Kline SJ, Spalart PR (1989) Quasi-coherent structures in the turbulent boundary layer. Part II. Verification and new information from a numerically simulated flat-plate boundary layer. In: Kline SJ, Afgan NH (eds) Near wall turbulence. Proceedings of Zaric memorial conference, New York, Hemisphere, pp 218–247Google Scholar
  26. Sakakibara J, Hishida K, Maeda M (1997) Vortex structure and heat transfer in the stagnation region of an impinging plane jet (simultaneous measurements of velocity and temperature fields by digital particle image velocimetry and laser-induced fluorescence). Int J Heat Mass Transf 40(13):3163–3176CrossRefGoogle Scholar
  27. Schram C, Rambaud P, Riethmuller ML (2004) Wavelet based eddy structure eduction from a backward facing step flow investigated using PIV. Exp Fluids 36:233–245CrossRefGoogle Scholar
  28. Vandsburger U, Ding C (1995) Self-excited wire method for the control of turbulent mixing layers. AIAA J 33(6):1032–1037CrossRefGoogle Scholar
  29. Yokobori S, Kasagi N, Hirata M (1977) Characteristic behaviour of turbulence in the stagnation region of a two-dimensional submerged jet impinging normally on a flat plate. In: Proceedings of symposium on turbulent shear flows, April 18–20, Pennsylvania, pp 3.17–3.25Google Scholar
  30. Zaman KBMQ, Hussain AKMF (1981) Turbulence suppression in free shear flows by controlled excitation. J Fluid Mech 103:133–159CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Ecole des Mines de Nantes, Département Systèmes Energétiques et EnvironnementGEPEA UMR 6144—CNRSNantes Cedex 3France

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