Experiments in Fluids

, Volume 40, Issue 6, pp 928–941 | Cite as

Particle image velocimetry studies of an incipient spot in the Blasius boundary layer

  • A. S. Banerjee
  • A. C. Mandal
  • J. DeyEmail author
Research Article


Spatial evolution of a small amplitude localized disturbance introduced into the laminar boundary layer of a flat plate has been studied experimentally using the particle image velocimetry (PIV) technique. PIV data have been acquired in the spanwise and wall normal planes. Long and well defined high and low speed streaks are seen in the spanwise plane. The number of streaks are found to increase in the downstream direction. Breathing mode type oscillation of the boundary layer is observed. Associated with the streaks and akin to the bypass transition, ‘backward’ and ‘forward’ jet like structures of the fluctuating velocity components are observed.


Particle Image Velocimetry Particle Image Velocimetry Measurement Laminar Boundary Layer Particle Image Velocimetry Data Turbulent Spot 
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.



The authors sincerely thank the Department of Science and Technology for funding the PIV unit through the FIST programme.


  1. Amini J, Lespinard G (1982) Experimental study of an “incipient spot” in a transitional boundary layer. Phys Fluids 25:1743–1750CrossRefGoogle Scholar
  2. Andersson P, Berggren M, Henningson DS (1999) Optimal disturbances and bypass transition in boundary layers. Phys Fluids 11:134–150CrossRefMathSciNetzbMATHGoogle Scholar
  3. Bakchinov AA, Westin KJA, Kozlov VV, Alfredsson PH (1994) On the receptivity of a flat plate boundary layer to localized free stream disturbances. In: IUTAM Symposium, Sendai, pp 341–348Google Scholar
  4. Boiko AV, Grek GR, Dovgal AV, Kozlov VV (2002) The origin of turbulence in near-wall flows. Springer, Berlin Heidelberg New YorkzbMATHGoogle Scholar
  5. Breuer KS, Haritonidis JH (1990) The evolution of a localized disturbance in a laminar boundary layer. Part 1. Weak disturbances. J Fluid Mech 220:569–594CrossRefGoogle Scholar
  6. Christensen KT (2004) The influence of peak-locking errors on turbulence statistics computed from PIV ensembles. Exp Fluids 36:484–497CrossRefGoogle Scholar
  7. Foucaut JM, Carlier J, Stanislas M (2004) PIV optimization for the study of turbulent flow using spectral analysis. Meas Sci Technol 15:1046–1058CrossRefGoogle Scholar
  8. Gaster M, Grant I (1975) An experimental investigation of the formation and development of a wave packet in a laminar boundary layer. Proc R Soc Lond A 347:253–269CrossRefGoogle Scholar
  9. Gutmark E, Blackwelder RF (1987) On the structure of turbulent spot in a heated laminar boundary layer. Exp Fluids 5:217–229Google Scholar
  10. Jacobs RG, Durbin PA (2001) Simulations of bypass transition. J Fluid Mech 428:185–212CrossRefzbMATHGoogle Scholar
  11. Kostas J, Soria J, Chong MS (2002) Particle image velocimetry measurements of a backward-facing step flow. Exp Fluids 33:838–853Google Scholar
  12. Lourenco LM, Krothapalli A (2000) TRUE resolution PIV: a mesh-free second order accurate algorithm. In: Proceedings of the International Conference in applications of lasers to fluid mechanics, LisbonGoogle Scholar
  13. Luchini P (2000) Reynolds number independent instability of the boundary-layer over a flat surface: optimal perturbations. J Fluid Mech 404:289–309CrossRefMathSciNetzbMATHGoogle Scholar
  14. Mandal AC (2005) Particle image velocimetry (PIV) measurements in a low intermittency transitional flow. Master of Science Thesis, Department of Aerospace Engineering, Indian Institute of ScienceGoogle Scholar
  15. Matsubara M, Alfredsson PH (2001) Disturbance growth in boundary layers subjected to free-stream turbulence. J Fluid Mech 430:149–168CrossRefzbMATHGoogle Scholar
  16. Narasimha R, Prasad SN (1994) Leading edge shape for flat plate boundary layer studies. Exp Fluids 17:358–360CrossRefGoogle Scholar
  17. Narasimha R, Devasia KJ, Gururani G, Badri Narayanan MA (1984) Transitional intermittency in boundary layers subjected to pressure gradient. Exp Fluids 2:171–176CrossRefGoogle Scholar
  18. Schröder A, Kompenhans J (2004) Investigation of a turbulent spot using multi-plane stereo particle image velocimetry. Exp Fluids 36:82–90CrossRefGoogle Scholar
  19. Schubauer GB, Klebanoff PS (1955) Contribution on the mechanics of boundary layer transition. NACA TN-3489Google Scholar
  20. Vasudevan KP, Dey J, Prabhu A (2001) Spot propagation characteristics in laterally strained boundary layers. Exp Fluids 30:488–491CrossRefGoogle Scholar
  21. Wallace JM, Eckelmann H, Brodkey RS (1972) The wall region in turbulent shear flow. J Fluid Mech 54:39–48CrossRefGoogle Scholar
  22. Westin KJA, Boiko AV, Klingmann BGB, Kozlov VV, Alfredsson PH (1994) Experiments in a boundary layer subjected to free stream turbulence. Part 1. Boundary layer structure and receptivity. J Fluid Mech 281:193–218CrossRefGoogle Scholar
  23. Westin KJA, Bakchinov AA, Kozlov VV, Alfredsson PH (1998) Expereiments on localized disturbances in a flat plate boundary layer. Part 1. The receptivity and evolution of a localized free stream disturbance. Eur J Mech B/Fluids 17:823–846CrossRefzbMATHGoogle Scholar
  24. Wygnanski I, Haritonidis JH, Kaplan RE (1979) On Tollmien-Schlichting wave packet produced by a turbulent spot. J Fluid Mech 92:505–528CrossRefGoogle Scholar
  25. Wygnanski I, Zilberman M, Haritonidis JH (1982) On the spreading of turbulent spot in the absence of a pressure gradient. J Fluid Mech 123:69–90CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.Department of Aerospace EngineeringIndian Institute of ScienceBangaloreIndia

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