On three-dimensional quasiperiodic Floquet instabilities of two-dimensional bluff body wakes

H. M. Blackburn, Juan Lopez

Research output: Contribution to journalArticle

81 Citations (Scopus)

Abstract

Previous studies dealing with Floquet secondary stability analysis of the wakes of circular and square cross-section cylinders have shown that there are two synchronous instability modes, with long (mode A) and short (mode B) spanwise wavelengths. At intermediate wavelengths another mode arises, which reaches criticality at Reynolds numbers higher than modes A or B. Here we concentrate on these intermediate-wave number modes for the wakes of circular and square cylinders. It is found that in both cases these modes possess complex-conjugate pair Floquet multipliers, and can be combined to produce either standing or traveling waves. Both these states are quasiperiodic.

Original languageEnglish (US)
JournalPhysics of Fluids
Volume15
Issue number8
DOIs
StatePublished - Aug 2003

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bluff bodies
wakes
Wavelength
Reynolds number
high Reynolds number
multipliers
circular cylinders
standing waves
wavelengths
traveling waves
cross sections

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Mechanics
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes
  • Condensed Matter Physics

Cite this

On three-dimensional quasiperiodic Floquet instabilities of two-dimensional bluff body wakes. / Blackburn, H. M.; Lopez, Juan.

In: Physics of Fluids, Vol. 15, No. 8, 08.2003.

Research output: Contribution to journalArticle

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