External noise and the origin and dynamics of structure in convectively unstable systems |
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| Authors: | Robert J Deissler |
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| Institution: | (1) National Center for Atmospheric Research, 80307-3000 Boulder, Colorado |
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| Abstract: | Some basic concepts and earlier work on external noise and the convectively unstable Ginzburg-Landau equation are reviewed, and some of the ideas presented in the earlier work are investigated further and extended. In particular, further consideration is given to convective chaos-chaos which only occurs in a moving frame of reference; and slugs-localized structures which are surrounded by a stable stationary state. Some new results on secondary convective instabilities and on periodic systems with a spatially varying instability are discussed. Work on the coupled Ginzburg-Landau equation is reviewed. Actual physical systems are discussed. |
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| Keywords: | Convective instability noise-sustained structure spatiotemporal intermittency convective chaosslugs additive noise Ginzburg-Landauequation pattern selection open-flow systems secondary instability |
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