Advertisement

Journal of Visualization

, Volume 9, Issue 1, pp 49–56 | Cite as

An improved, free surface, topographic technique

  • Fouras A. 
  • Hourigan K. 
  • Kawahashi M. 
  • Hirahara H. 
Article

Abstract

Current techniques of water wave visualization such as shadowgraphy and stereo photography are widely used but are deficient in many aspects. Refraction based visualization observes the bending of light as it traverses across a liquid-air interface. This work describes the continued development of techniques to measure the surface height of a liquid free surface. The method, Reference Image Topography, utilizes refraction of light at the free surface as a function of the local angle of that surface. Particle Image Velocimetry (PIV) software is used to evaluate apparent dislocations of the target image viewed through the free surface, which are approximately proportional to the surface angle. High-resolution images are presented of the dynamic surface topography for a point source and the shallow water flow around a vertical cylinder.

Keywords

Visualization Free Surface Topography PIV 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Adrian, R. J., Particle-imaging techniques for experimental fluid mechanics, Ann. Rev. Fluid Mech., 23 (1991), 261.CrossRefGoogle Scholar
  2. Brocher, E. and Makhsud, A., New look at the screech tone mechanism of underexpanded jets, Eur. J. Mech. B/Fluids, 16 (1997), 877.MATHGoogle Scholar
  3. Fomim, N., Lavinskaja, E., Merzkirch, W. and Vitkin, D., Speckle photography applied to statistical analysis of turbulence, Optics & Laser Tech., 31 (1999), 13.CrossRefGoogle Scholar
  4. Fu, H. and Rockwell, D., Shallow flow past a cylinder: Control of near wake, JFM, 539 (2005), 1.MATHCrossRefGoogle Scholar
  5. Hughes, H. A., Grant, H. L. and Chappell, R. W., A fast response surface-wave slope meter and measured wind-wave moments, Deep-Sea Research, 24 (1977), 1211.CrossRefGoogle Scholar
  6. Jahne, B., Klinke, J. and Waas, S., Imaging of short ocean wind waves: a critical theoretical review, J. Opt. Soc. Am. A, 11 (1994), 2197.CrossRefGoogle Scholar
  7. Tanaka, G., Okamoto, K. and Madarame, H., Experimental investigation on the interaction between a polymer solution jet and a free surface, Exp. Fluids, 29 (2000), 178.CrossRefGoogle Scholar
  8. Zhang, X., Dabiri, D. and Gharib, M., A novel technique for free surface elevation mapping, Phys. Fluids, 6, S11 (1994).Google Scholar

Copyright information

© The Visualization Society of Japan 2006

Authors and Affiliations

  • Fouras A. 
    • 1
  • Hourigan K. 
    • 1
  • Kawahashi M. 
    • 2
  • Hirahara H. 
    • 2
  1. 1.Fluids Laboratory for Aeronautical and Industrial Research (FLAIR), Dept. Mechanical EngineeringMonash UniversityVictoriaAustralia
  2. 2.Dept. Mechanical EngineeringSaitama UniversitySaitamaJapan

Personalised recommendations