THERMAL SCIENCE

International Scientific Journal

EXPERIMENTAL INVESTIGATION OF TURBULENT STRUCTURES OF FLOW AROUND A SPHERE

ABSTRACT
This paper presents the experimental investigation of turbulent structures of flow around a sphere. The mean velocity field and the turbulence quantities are obtained in a small low speed wind tunnel using, laser-Doppler anemometry, for the flow around a sphere at subcritical Reynolds number of 50,000. The results of laser-Doppler measurements are compared with results obtained by large eddy simulation. In this paper also flow visualization around sphere in the bigger wind tunnel and water channel for Reynolds numbers between 22,000 and 400,000 have been done.
KEYWORDS
PAPER SUBMITTED: 2005-11-08
PAPER REVISED: 2005-12-15
PAPER ACCEPTED: 2006-01-12
DOI REFERENCE: https://doi.org/10.2298/TSCI0602097B
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2006, VOLUME 10, ISSUE Issue 2, PAGES [97 - 112]
REFERENCES
  1. Achenbach, E., Experiments on the flow past spheres at very high Reynolds numbers, Journal of. Fluid Mechanics, 54 (1972), pp. 565 ? 575.
  2. Kim, H.J., Durbin, P.A., Observations of the frequencies in a sphere wake and of drag increase by acoustic excitation, Physics of Fluids, A 31 (1988), pp. 3260 ? 3265.
  3. Sakamoto, H., Haniu, H., A study of vortex shedding from sphere in a uniform flow, Transactions of the ASME, 112 (1999), pp. 386 ? 392.
  4. Taneda, S., Visual observations of the flow past a sphere at Reynolds numbers between 104 and 106, Journal of Fluid Mechanics, 85 (1978), pp. 187-192.
  5. Bakic, V., Experimental investigation of a flow around a sphere, Thermal Science, 8 (2004) 1, pp. 63-81.
  6. Magarvey, R.H., Bishop, L.R., Transition ranges for three-dimensional wakes, Canadian Journal of Physic, 39 (1961), pp. 1418 ? 1422.
  7. Raithby, G.D., Eckert, E.R.G., The effect of support position and turbulence intensity on the flow near the surface of a sphere, W?rme und Stoff, 1 (1968), pp. 87 ? 94.
  8. Wieselberger, C., A sphere drag, Zeitschrift f?r Mechanics, 5 (1914), pp. 140 ? 144.
  9. Fage, A., The effects of turbulence and surface roughness on the drag of a circular cylinder, Reports and Memoranda, 1283 (1923), pp. 248-255.
  10. Hadzic, I., Bakic, V., Peric, M., Sajn, V., Kosel, F., Experimental and numerical studies of flow around sphere at subcritical Reynolds number. Proceedings, Engineering Turbulence Modeling and Experiments 5, Mallorca, Spain, September 16-18, 2002, pp. 667-675.
  11. Leder, A., Geropp, D., The Unsteady flow Structure in the Wake of the Sphere, Laser Anemometry Advances and Applications, (1993), pp. 119-125
  12. Schmid, M., Large eddy simulation of turbulent flow with unstructured grid and with finite volume parallel methods (in German), PhD Thesis, TUHH, Hamburg, Germany, 2001
  13. Seidl, V., Development and use of parallel finite volume procedure for flow simulation using unstructured grid with local refinement (in German), Ph.D. Thesis, TUHH Hamburg, Germany, 1997
  14. Johnson, T.A., Patel, V.C., Flow past a sphere up to a Reynolds number of 300, Journal of Fluid Mechanics, 378 (1999), pp. 19 ? 70.
  15. Tomboulides, A.G., Orszag, S.A., Numerical investigation of transitional and weak turbulent flow past a sphere, Journal of Fluid Mechanics, 416 (2000), pp. 45 ? 73.
  16. Tomboulides, A.G.,Orszag, S.A., Karniakidis, S.A., Direct and large eddy simulations of axis symmetric wakes, in: Rodi W. and Martelli F. (eds.) Engineering Modeling and Experiments 2, pp. 273 ? 282, 1993
  17. Constantinescu, G.S., Squires, K.D., LES and DES Investigations of turbulent flow over a sphere at Re = 10,000, Flow, Turbulence and Combustion, 70 (2003), pp. 267-298.
  18. Pao, H.P., Kao, T.W., Vortex structure in the wake of a sphere, Physics of Fluids, 20 (1977) (2), pp 187-191.
  19. Bakic, V., Experimental investigation of turbulent flows around a sphere, PhD Thesis, TUHH, Hamburg, Germany, 2003
  20. Ferziger, J.H., Direct and large eddy simulation of turbulence, Lecture note: Understanding, Modelling and Simulation of Turbulence. Hamburg, Germany, 1999
  21. Ho, C.M., Huerre, P., Perturbed free shear layers, Annual Revue of Fluid Mechanics, 16 (1984), pp 365-424.
  22. Winant, C.D., Browand, F.K., Vortex pairing, the mechanism of turbulent mixing-layer growth at moderate Reynolds numbers, Journal of Fluid Mechanics, 63 (1974), pp. 237-255.
  23. Ho, C.M., Huang, L.S., Subharmonics and vortex merging in mixing layers, Journal of Fluid Mechanics, 119 (1982), pp. 443-473.
  24. Prasad, A., Williamson, H.K., The instability of the shear layer separating from a bluff body, Journal of Fluid Mechanics, 333 (1997), pp. 375-402.

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