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arXiv · patt-sol/9602003

Core Dynamics of Multi-Armed Spirals in Rayleigh-Benard Convection

Brendan B. Plapp·Eberhard Bodenschatz
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Abstract

We report experimental observations of the core dynamics of multi-armed, rotating spirals in Rayleigh-Benard convection for a fluid with Prandtl number near one. In addition to the large-scale rotation of the spirals, we found a cyclic core motion within a central area of radius r = appr. (n lambda/2), where n is the number of spiral arms ending in the core and lambda is the wavelength of the pattern. The dynamics of the core was much faster than the large-scale spiral rotation. We observed multi-armed spirals for which the two periods were commensurate and others for which they were incommensurate.

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BibTeXRIS

Brendan B. Plapp, Eberhard Bodenschatz. 1996-02-14. Core Dynamics of Multi-Armed Spirals in Rayleigh-Benard Convection. https://doi.org/10.1088/0031-8949%2F1996%2Ft67%2F022

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