Correlation length and force phasing of a rigid cylinder subject to VIV

D. Lucor, J. Foo, G. E. Karniadakis

Research output: Chapter in Book/Report/Conference proceedingChapter

4 Scopus citations

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 8trouhal 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.

Original languageEnglish (US)
Title of host publicationIUTAM Symposium on Integrated Modeling of Fully Coupled Fluid Structure Interactions Using Analysis, Computations and Experiments
EditorsHAYM BENAROYA, TIMOTHY WEI
Pages187-199
Number of pages13
DOIs
StatePublished - Dec 1 2004

Publication series

NameFluid Mechanics and its Applications
Volume75
ISSN (Print)0926-5112

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