Correlation Length and Force Phasing of a Rigid Cylinder Subject to VIV

  • D. Lucor
  • J. Foo
  • G. E. Karniadakis
Conference paper
Part of the Fluid Mechanics and its Applications book series (FMIA, volume 75)

Abstract

We present direct numerical simulations (DNS) of uniform flow at subcritical Reynolds number past a flexibly-mounted rigid cylinder subject to vortex-induced vibrations (VIV). We investigate different nominal reduced velocities near or in the region of maximum amplitude response for a small mass ratio and zero structural damping. We compute the correlation length of the flow quantities in the near wake and relate it to the force correlations along the cylinder. We perform a complex demodulation analysis to quantify the phase difference between structural displacement and forces. There exists a reduced velocity region near the Strouhal frequency, for which a sharp drop in the spanwise correlation of the flow quantities in the near wake and the forces is observed. This decrease in the spanwise correlation corresponds to a poor phasing between displacement and forces but it does not preclude a large response from the structure.

Keywords

Lift Force Lift Coefficient Rigid Cylinder Complex Demodulation Force Correlation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer Science+Business Media Dordrecht 2003

Authors and Affiliations

  • D. Lucor
    • 1
  • J. Foo
    • 1
  • G. E. Karniadakis
    • 1
  1. 1.Division of Applied Mathematics Brown UniversityUSA

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