Experiments in Fluids

, Volume 36, Issue 3, pp 384–392

An experimental study of a turbulent shear layer at a clean and contaminated free-surface



An experimental study was performed to measure the flow properties of a vertically-orientated shear layer in the vicinity of a free-surface. The effect of surface contamination on the near surface flow field was also determined. Digital Particle Image Velocimetry was used to measure instantaneous and averaged velocity, vorticity, and Reynolds stresses. Results show that the presence of surfactants can cause directional shifts of the shear layer, as well as an overall damping of the turbulence in the vicinity of the free-surface, except in the vicinity of a Reynolds ridge where an increase in Reynolds stress was observed.


Turbulent shear layer Surfactants Free-surface 


  1. Chang C, Frances E (1995) Adsorption dynamics of surfactants at the air/water interface: a critical review of mathematical models, data, and mechanisms. Colloids Surf, A 100:1–45Google Scholar
  2. Davies JT (1966) The effects of surface films in damping eddies at a free-surface of a turbulent liquid. P Roy Soc Lond A Mat 290:515–526Google Scholar
  3. Dimotakis P (1986) Two-dimensional shear layer entrainment. AIAA J 24(11):1791–1796Google Scholar
  4. Edwards D, Brenner H, Wasan D (1991) Interfacial transport processes and rheology. Butterworth-Heinemann, Stoneham, MAGoogle Scholar
  5. Gharib M, Weigand A (1996) Experimental studies of vortex disconnection at a free-surface. J Fluid Mech 321:59–86Google Scholar
  6. Hirsa A, Harper J, Kim S (1995) Columnar vortex generation and interaction with a clean and contaminated free-surface. Phys Fluids 11:2532–2534CrossRefGoogle Scholar
  7. Lang AW, Gharib M (2000) Experimental study of the wake behind a surface-piercing cylinder for a clean and contaminated free-surface. J Fluid Mech 402:109–136CrossRefGoogle Scholar
  8. Maheo P (1998) Free-surface turbulent shear flows. PhD Thesis, California Institute of Technology, CAGoogle Scholar
  9. Milgram J (1998) Short wave damping in the simultaneous presence of a surface film and turbulence. J Geophys Res 103(C8):15,717–15,727Google Scholar
  10. Reed A, Milgram J (2002) Ship wakes and their radar images. Annu Rev Fluid Mech 34:469–502CrossRefGoogle Scholar
  11. Scott J (1982) Flow beneath a stagnant film on water: the Reynolds ridge. J Fluid Mech 116:283–296Google Scholar
  12. Shen L, Zhang X, Yue D, Triantafyllou G (1999) The surface layer for free-surface turbulent flows. J Fluid Mech 386:167–212CrossRefGoogle Scholar
  13. Tsai W (1996) Impact of a surfactant on a turbulent shear layer under the air-sea interface. J Geophys Res 101(C12):28,557–28,568Google Scholar
  14. Warncke A, Gharib M, Roesgen T (1996) Flow measurements near a Reynolds ridge. J Fluids Eng 118:621–624Google Scholar
  15. Willert C, Gharib M (1991) Digital particle image velocimetry. Exp Fluids 10:181–193Google Scholar

Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  1. 1.Department of Aerospace and Mechanical Engineering, Parks College of Engineering and AviationSaint Louis UniversitySt. LouisUSA

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