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Article Dans Une Revue Journal of Fluid Mechanics Année : 2024

A critical transition of two-dimensional flow in toroidal geometry

Résumé

We investigate two-dimensional (2-D) axisymmetric flow in toroidal geometry, with a focus on a transition between 2-D three-component flow and 2-D two-component flow. This latter flow state allows a self-organization of the system to a quiescent dynamics, characterized by long-living coherent structures. When these large-scale structures orient in the azimuthal direction, the radial transport is reduced. Such a transition, if it can be triggered in toroidally confined fusion plasmas, is beneficial for the generation of zonal flows and should consequently result in a flow field beneficial for confinement.
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hal-04620096 , version 1 (21-06-2024)

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Wesley Agoua, Benjamin Favier, Jorge Morales, Wouter J.T. Bos. A critical transition of two-dimensional flow in toroidal geometry. Journal of Fluid Mechanics, 2024, 988, pp.A33. ⟨10.1017/jfm.2024.425⟩. ⟨hal-04620096⟩
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