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Competing and coexisting dynamical states of travelling-wave convection in an annulus

Published online by Cambridge University Press:  26 April 2006

D. Bensimon
Affiliation:
AT & T Bell Laboratories, Murray Hill, NJ 07974, USA
Paul Kolodner
Affiliation:
AT & T Bell Laboratories, Murray Hill, NJ 07974, USA
C. M. Surko
Affiliation:
AT & T Bell Laboratories, Murray Hill, NJ 07974, USA Present address: Department of Physics and Institute for Nonlinear Science, University of California at San Diego, La Jolla, CA 92093, USA.
Hugh Williams
Affiliation:
AT & T Bell Laboratories, Murray Hill, NJ 07974, USA
V. Croquette
Affiliation:
AT & T Bell Laboratories, Murray Hill, NJ 07974, USA Present address: Ecole Normale Supérieure, 24, rue Lhomond, 75231 Paris, France.

Abstract

We describe experiments on convection in binary fluid mixtures in a large-aspect-ratio annular container. In this geometry, the convective rolls align radially and travel azimuthally, providing a model of travelling waves in an extended one-dimensional nonlinear dynamical system. Several different stable non-equilibrium states can be produced in this experiment, and the competition between them leads to a wide variety of steady and time-dependent behaviour. The observed spatiotemporal behaviour may shed light on recent theories of the nature of stable nonlinear travelling-wave convection, the pinning of travelling waves, and the creation of spatiotemporal defects.

Type
Research Article
Copyright
© 1990 Cambridge University Press

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