Mode competition in modulated Taylor-Couette flow

M. Avila, M. J. Belisle, Juan Lopez, F. Marques, W. S. Saric

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

The effects of harmonically oscillating the inner cylinder about a zero mean rotation in a Taylor-Couette flow are investigated experimentally and numerically. The resulting time-modulated circular Couette flow possesses a Z2 spatio-temporal symmetry which gives rise to two distinct modulated Taylor vortex flows. These flows are initiated at synchronous bifurcations, have the same spatial symmetries, but are characterized by different spatio-temporal symmetries and axial wavenumber. Mode competition between these two states has been investigated in the region where they bifurcate simultaneously. In the idealized numerical model, the two flows have been found to coexist and be stable in a narrow region of parameter space. However, in the physical experiment, neither state has been observed in the coexistence region. Instead, we observe noise-sustained flows with irregular time-dependent axial wavenumber. Movies are available with the online version of the paper.

Original languageEnglish (US)
Pages (from-to)381-406
Number of pages26
Journaljournal of fluid mechanics
Volume601
DOIs
StatePublished - Apr 25 2008

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Mode competition in modulated Taylor-Couette flow'. Together they form a unique fingerprint.

  • Cite this