Modulated rotating convection

Radially travelling concentric rolls

A. Rubio, Juan Lopez, F. Marques

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Recent experiments in rotating convection have shown that the spatio-temporal bulk convective state with Küppers-Lortz dynamics can be suppressed by small-amplitude modulations of the rotation rate. The resultant axisymmetric pulsed target patterns were observed to develop into axisymmetric travelling target patterns as the modulation amplitude and Rayleigh number were increased. Using the Navier-Stokes-Boussinesq equations with physical boundary conditions, we are able to numerically reproduce the experimental results and gain physical insight into the responsible mechanism, relating the onset of the travelling target patterns to a symmetry-restoring saddle-node on an invariant circle bifurcation. Movies are available with the online version of the paper.

Original languageEnglish (US)
Pages (from-to)357-378
Number of pages22
JournalJournal of Fluid Mechanics
Volume608
DOIs
StatePublished - Aug 2008

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Amplitude modulation
convection
Navier Stokes equations
saddles
Boundary conditions
Rayleigh number
boundary conditions
Experiments
symmetry
Convection

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Mechanics
  • Physics and Astronomy(all)
  • Condensed Matter Physics

Cite this

Modulated rotating convection : Radially travelling concentric rolls. / Rubio, A.; Lopez, Juan; Marques, F.

In: Journal of Fluid Mechanics, Vol. 608, 08.2008, p. 357-378.

Research output: Contribution to journalArticle

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