Endwall effects in a periodically forced centrifugally unstable flow

Juan Lopez, F. Marques, J. Shen

Research output: Contribution to journalArticle

4 Scopus citations

Abstract

Recent experiments of Weisberg et al. (1997. J. Fluid Mech. 348, 141-151) have demonstrated that the onset of the centrifugal instability leading to Taylor vortex flow can be delayed by harmonic oscillations of the inner cylinder in the axial direction. Marques and Lopez (1997. J. Fluid Mech. 348, 153-175) used Floquet analysis to describe the observed control of the instability over a wide range of frequencies and amplitudes of this oscillation; the dynamics remained axisymmetric and the response to the applied periodic control mechanism was synchronous over an extensive range of parameters. Here we implement an accurate and efficient spectral-projection scheme for solving the fully nonlinear axisymmetric Navier-Stokes equations to examine the effects of endwalls on the flow dynamics and the breaking of space-time symmetries. By varying a single parameter we have detected a route to chaos. As the parameter is increased the system undergoes a quasiperiodic Naimark-Sacker bifurcation, goes through a 1:9 resonance horn (Arnold's tongue), and then chaos. (C) 2000 The Japan Society of Fluid Mechanics and Elsevier Science B.V. All rights reserved.

Original languageEnglish (US)
Pages (from-to)91-108
Number of pages18
JournalFluid Dynamics Research
Volume27
Issue number2
DOIs
StatePublished - Aug 1 2000

Keywords

  • Naimark-Sacker bifurcation
  • Periodic forcing
  • Route to chaos
  • Taylor-Couette flow

ASJC Scopus subject areas

  • Mechanical Engineering
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

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