INSTANTANEOUS STRUCTURE OF THE NEAR-WAKE OF A CIRCULAR CYLINDER: ON THE EFFECT OF REYNOLDS NUMBER

The near wake structure of a cylinder is examined for Reynolds numbers from 103 to 104, with the intent of providing insight into the large changes in mean base pressure and fluctuating lift observed in previous investigations. The use of high-image-density particle image velocimetry allows the generation of instantaneous and averaged representations of velocity fields, streamline topology, and vorticity distributions. Modes of large-scale (Karman) vortex formulation, in conjunction with patterns of small-scale (Kelvin- Helmoltz) vortical structures, allow physical interpretation of the vortex formation length, which is the traditional criterion for linking the flow pattern to the loading coefficients.

  • Supplemental Notes:
    • J Fluids and Structures, v 9 n 4, May 1995, p 409 [14 p, 22 ref, 5 fig]
  • Authors:
    • Lin, J C
    • Towfighi, J
    • Rockwell, D
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00717041
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 4 1996 12:00AM