EXPERIMENTAL INVESTIGATION OF A FLOW AROUND A SPHERE

Abstract

This paper presents the experimental results for the flow around a sphere: a smooth sphere in flow with low inlet turbulence, a sphere with trip wire, and a sphere in flow with high free stream turbulence, at subcritical Reynolds number. The mean velocity field and the turbulence quantities are obtained using laser-Doppler anemometry. Comparison of velocity field and turbulence characteristics for different flow configuration are given.

Keywords

Dates

  • Submission Date2004-02-06
  • Revision Date2004-03-16
  • Acceptance Date2004-04-18

References

  1. [1] Achenbach, E., Experiments on the Flow Past Spheres at Very High Reynolds numbers., Journal of. Fluid Mechanics, 54 (1972), pp. 565-575
  2. [2] Bearman, P.W., Turbulence Effects on Bluff Body Mean Flow, Proceeding 3th U.S. National Conference. on Wind Engineering, Florida, 1978, pp.LV-1
  3. [3] Fage, A., The Effects of Turbulence and Surface Rougness on the Drag of a Circular Cylinder, Reports and Memoranda, No. 1283 (1929), pp. 248-255
  4. [4] 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
  5. [5] 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
  6. [6] Leder, A., Geropp, D., The Unsteady Flow Structure in the Wake of the Sphere, Laser Anemometry Advances and Applications, 1993, pp. 119-125
  7. [7] Magarvey, R. H., Bishop, L. R., Transition Ranges for Three-dimensional Wakes, Canadian Journal of Physic, 39 (1961), pp. 1418-1422
  8. [8] 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䲭e und Stoff, 1 (1968), pp. 87-94
  9. [9] Sakamoto, H., Haniu, H., A Study of Vortex Shedding From Sphere in a Uniform Flow, Transactions of the ASME, 112 (1990), pp. 386 ? 392
  10. [10] Seidl, V., Development and Use of Parallel Finite Volume Procedure for Flow Simulation Using Unstructured Grid with Local Refinement, Ph.D. thesis, Technical University Hamburg - Harburg, 1997
  11. [11] Schmid, M., Large Eddy Simulation of Turbulent Flow with Unstructured Grid and with Finite Volume Parallel Methods. PhD. thesis, Tehnical IUniversity Hamburg-Harburg, 2001
  12. [12] 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
  13. [13] Wieselberger, C., A Sphere Drag. Zeitschrift f?r Mechanics, 5 (1914), pp. 140-144.
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