Zonal Flow Patterns: How Toroidal Coupling Induces Phase Jumps and Shear Layers
A new, frequency modulation mechanism for zonal flow pattern formation is presented. The model predicts the probability distribution function of the flow strength as well as the evolution of the characteristic spatial scale. Magnetic toroidicity-induced global phase dynamics is shown to determine th...
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Veröffentlicht in: | Physical review letters 2016-09, Vol.117 (12), p.125002-125002, Article 125002 |
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Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
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Online-Zugang: | Volltext |
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Zusammenfassung: | A new, frequency modulation mechanism for zonal flow pattern formation is presented. The model predicts the probability distribution function of the flow strength as well as the evolution of the characteristic spatial scale. Magnetic toroidicity-induced global phase dynamics is shown to determine the spatial structure of the flow. A key result is the observation that global phase patterning can lead to zonal flow formation in the absence of turbulence inhomogeneity. |
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ISSN: | 0031-9007 1079-7114 |
DOI: | 10.1103/PhysRevLett.117.125002 |