Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Measurement of Turbulent Intensity Distributions of a Cylinder Wake

  • Received : 2013.03.25
  • Accepted : 2013.04.08
  • Published : 2013.04.25
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Abstract

Turbulence properties of a cylinder wake (d=10 mm) have been investigated with a new volume PTV algorithm. The measurement system consists of two-high-cameras(1 $k{\times}1$ k), a Nd-Yag laser and a host computer. A fitness function representing three-dimensional coherency has been adopted to sort out spurious vectors. A hybrid fitness function representing the relations between the fitness and the three-dimensional shortest distances constructed by the two collinears of the two cameras has been also adopted. The constructed algorithm has been employed for the measurements of the cylinder wakes. The Reynolds numbers tested in this paper are 360, 540, 720, 900, 1080 and 1260. More than 10,000 instantaneous 3D vectors have been obtained by the constructed system. The volumetric distributions of the turbulence intensities (for u', v', w') indicate that clearly different patterns for all Reynolds numbers and imply that a regular pattern (like a similarity rule) for the turbulent properties exists.

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References

  1. Monkewitz, P.A., 1988, "The Absolute and Convective Nature of Instability in Two-Dimensional Wakes at Low Reynolds Numbers", Phys. Fluids, Vol. 31, pp. 999-1006. https://doi.org/10.1063/1.866720
  2. Williamson, C.H.K., 1996a, "Vortex Dynamics in the Cylinder Wake", Ann. Rev. Fluid Mech., Vol. 28, pp. 477-539. https://doi.org/10.1146/annurev.fl.28.010196.002401
  3. Williamson, C.H.K., 1996b, "Three Dimensional Wake Transition", J. Fluid Mech., Vol. 328, pp. 345-407. https://doi.org/10.1017/S0022112096008750
  4. Thompson, M., Hourigan, M., and Sheridan, J., 1996. "Three Dimensional Instabilities in the Wake of a Circular Cylinder", Exp. Therm. Fluid Sci., Vol. 12, pp. 190-196. https://doi.org/10.1016/0894-1777(95)00098-4
  5. Arroyo, M. P., and Greated, C. A., 1991, "Stereoscopic Particle Image Velocimetry", Meas. Sci Technol, Vol. 2, pp. 1181-1186. https://doi.org/10.1088/0957-0233/2/12/012
  6. Kahler, C. J., and Kompenhans, J., 2000, "Fundamentals of Multiple Plane Stereo Particle Image Velocimetry", Exp Fluids, Suppl, pp. S70-S77.
  7. Hinsch, K. D., 2002, "Holographic Particle Image Velocimetry", Meas Sci Technol, Vol. 13, pp. R61-R72. https://doi.org/10.1088/0957-0233/13/7/201
  8. Chan, VSS., Koek, WD., Barnhart, D.H., Bhattacharya, N., Braat, JJM. & Westerweel, J. 2004. "Application of Holography to Fluid Flow Measurements using Bacteriorhodopsin", Meas Sci Technol, Vol. 15, pp. 647-655. https://doi.org/10.1088/0957-0233/15/4/006
  9. Coetmellec, S., Buraga-Lefebvre, C., Lebrun, D., and Ozkul, C. 2001, "Application of In-line Digital Holography to Multiple Plane Velocimetry", Meas Sci Technol, Vol. 12, pp.1392-1397. https://doi.org/10.1088/0957-0233/12/9/303
  10. Kim, S., and Lee, S.J., 2008 "Effect of Particle Number Density in In-line Digital Holographic Particle Velocimetry", Exp. in Fluids, Vol. 44. pp.623-631. https://doi.org/10.1007/s00348-007-0422-z
  11. Sung J., and Yoo, J. Y., 2001, "Three-Dimensional Phase-Averaging of Time-Resolved PIV Measurement Data", Meas. Sci. Technol., Vol. 12, pp. 655-662. https://doi.org/10.1088/0957-0233/12/6/301
  12. Scarano, F., Elsinga, G.E., Bocci, E, and van Oudheusden, B.W. 2006 "Investigation of 3-D Coherent Structures in the Turbulent Cylinder Wake using Tomo-PIV", CD-ROM Proc. of 13th Intl' Symp. on Appl. of Laser Tech. to Fluid Mech., Lisbon, 26-29 June.
  13. Doh, D.H., Kim, D.H., Cho, K.R., Cho, Y.B., Saga, T., and Kobayashi, T. 2002, "Development of Genetic Algorithm based 3D-PTV Technique", Journal of Visualization, Vol. 5, No.3, pp. 243-254. https://doi.org/10.1007/BF03182332
  14. Doh, D. H., Hwang, T. G., and Saga, T., 2004, "3D-PTV Measurements of the Wake of a Sphere", Meas Sci Technol, Vol. 15(6), pp.1059-1066. https://doi.org/10.1088/0957-0233/15/6/004
  15. Brede, M., Eckelmann, H., and Rockwell, D., 1996, "On Secondary Vortices in the Cylinder Wake", Phys. Fluids, Vol. 8, pp. 2117-2124. https://doi.org/10.1063/1.868986