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The Okubo-Weiss Criteria in Two-Dimensional Hydrodynamic and Magnetohydrodynamic Flows | | B. K. Shivamoggi
; G. J. F. van Heijst
; | | Date: |
27 Oct 2011 | | Abstract: | The "slow-variation" restriction on the straining flow velocity gradient
field used in the Okubo-Weiss criterion is quantified via the Beltrami
condition with the divorticity framework in 2D hydrodynamic flows. This turns
out to provide interesting interpretations of the Okubo-Weiss criterion in
terms of the topological properties of the underlying vorticity manifold. These
developments are then extended to 2D quasi-geostrophic flows (via the potential
divorticity framework) and magnetohydrodynamic flows and the Okubo-Weiss
criteria for these cases are considered. | | Source: | arXiv, 1110.6190 | | Services: | Forum | Review | PDF | Favorites | |
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