Novel Patterns and Chaotic Dynamics of Surface Waves
Collaborators: Jerry Gollub, Arshad Kudrolli, Mathew Abraham
Former collaborators: T. Besson, B. Pier, S. Edwards
Secondary instability and spatiotemporal chaos
As the driving acceleration is increased, spatiotemporal chaos (STC)
develops. The evolution of STC depends on the nature of the primary
patterns. For hexagons and squares, STC develops uniformly across the
container. On the other hand, for striped patterns, a fraction of the
container shows STC in a localized domain that grows as the driving
acceleration is increased. An example of such a "mixed state" is
shown below. If the acceleration is suddenly increased from below the
onset of the surface waves, STC first develops in the center of the
container (dark region), and then slowly moves to the side. One
observes that the STC domain always develops in the high curvature
region of the stripe pattern.
Mixed state: spatiotemporal chaos coexists with
stripes
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Last modified on 11/19/96.