Rotational oscillations of a cylinder in cross-flow

Qasem M. Al-Mdallal, Serpil Kocabiyik

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


The laminar unsteady periodic flow motion found in the wake of a rotationally oscillating circular cylinder is investigated numerically at a Reynolds number of 855 over a wide range of oscillation amplitude and frequency ratio. The governing Navier-Stokes equations are integrated to determine the flow field structure for large values of the time using an accurate spectral-finite difference method, but with the boundary vorticity calculated using global vorticity conditions rather than local finite-difference approximations. The lock-on phenomenon has been predicted and its effect on the flow hydrodynamics has been determined. The numerical scheme is verified by applying it to the special case of a steadily rotating cylinder (no forced oscillations) and good qualitative agreements are found.

Original languageEnglish
Pages (from-to)293-299
Number of pages7
JournalInternational Journal of Computational Fluid Dynamics
Issue number5
Publication statusPublished - Jun 1 2006


  • Cylinder
  • Fluid forces
  • Forced rotational oscillations
  • Incomprehensible
  • Lock-on
  • Unsteady
  • Viscous
  • Vortex-formation

ASJC Scopus subject areas

  • Computational Mechanics
  • Aerospace Engineering
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Mechanics of Materials
  • Mechanical Engineering


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