FLOW INTERACTION BEHIND TWO CIRCULAR CYLINDERS OF EQUAL DIAMETER - A NUMERICAL STUDY

Incompressible flows past two circular cylinders placed side by side in a uniform steam were investigated numerically by the discrete vortex model. The calculations were carried out a T/d = 1.25, 3.0 and 3.5, where T is the transverse distance between cylinder centres and d the cylinder diameter. The flow development was initiated by imposing a perturbation of short duration on the separated shear layers from the cylinders and four modes of perturbation were tried. For the mode 2 perturbation of T/d = 1.25, 3.0 and 3.5, the single vortex street, out-of-phase and in-phase vortex shedding modes were observed, respectively, agreeing with the well-known experimental results. At the bistable flow of T/d = 1.75 an asymmetric mode of vortex shedding was observed and the possible effects on flow parameters such as lift and drag were discussed.

  • Supplemental Notes:
    • J Wind Engng and Industrial Aerodynamics, v 54,55, Feb 1995, p 277 [11 p, 11 ref, 2 tab, 6 fig]
  • Authors:
    • Ng, C W
    • Ko, N W
  • Publication Date: 1995

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00710711
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Aug 14 1995 12:00AM