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Dwight Barkley and Laurette Tuckerman
This research concerns turbulent-laminar patterns found near transition in large-aspect-ratio plane Couette flow [6,7]. Such patterns are also found in circular Couette-Taylor flow [6,7] and in flow between a rotating and stationary disk [5]. These patterns appear to be related to spiral turbulence originally observed by Coles and van Atta [2,3,4]. Our work shows the existence of 3 basic types of states: intermittent, periodic, and localized. Read the PRL and JFM here: [1] |
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Turbulent-Laminar Patterns in Experiments These are all very large-aspect-ratio flows. The two directions seen are large compared with the remaining (wall-normal) direction. |
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Turbulent-Laminar Patterns in Simulations of Plane Couette Flow These are some visualizations of the spatially periodic pattern in our simulations at Re=350. |
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Movies Re=350 These are some visualizations of the spatially periodic pattern in our simulations at Re=350. |
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Movies Re=300 These are some visualizations of the localized turbulent state at Re=300. |
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