THE ONSET OF STREAMWISE VORTICAL STRUCTURE AND THE EARLY FEATURES OF COHERENT STRUCTURE BEHIND A 2-D CIRCULAR CYLINDER

The generation of streamwise vortical structure in the turbulent wake behind a 2-D circular cylinder is studies numerically by analysing the instability evolution of initially 2-D spanwise Karman vortex filaments and vortex filaments in braid regions of the wake based on vortex dynamics. A kind of 3-D vortex system consisting of large scale horseshoe-shaped vortices and small scale -shaped vortex filaments as well as vortex loops are presented. The mechanism and the dynamic process about the formation of streamwise vortex structure and the coherent structure are reported.

• Supplemental Notes:
  • ISOPE 93, 3rd Intl Offshore & Polar Engng Conf; 6-11 June 1993; Singapore. Sponsored by ISOPE, USA, et al. Procs. Publ by ISOPE, ISBN 1-880653-08-7. Vol III, p 458 [8 p, 18 ref, 3 fig]
• Authors:
  • Ling, G C
  • Wu, Z B
• Publication Date: 1993

Language

• English

Subject/Index Terms

• TRT Terms: Numerical analysis; Three dimensional flow; Wakes
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00716105
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Feb 28 1996 12:00AM