Zonal Flows in Two-Dimensional Decaying Magnetohydrodynamic Turbulence on a β-Plane


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Resumo

A scale for two-dimensional β-plane magnetohydrodynamic turbulence is proposed that characterizes an upper bound of the energy containing interval similar to a classical Rhines scale for neutral fluid turbulence on a -plane. It is found that only unsteady zonal flows with complex temporal dynamics are formed in two-dimensional magnetohydrodynamic turbulence on the -plane. It is shown that flow nonstationarity is due to the appearance of isotropic magnetic islands caused by the Lorentz force in the system. The characteristic dimensions of a flow are in agreement with the proposed scale.

Sobre autores

T. Zinyakov

Space Research Institute; Moscow Institute of Physics and Technology (State University)

Autor responsável pela correspondência
Email: zinyakov@phystech.edu
Rússia, Moscow, 117997; Dolgoprudnyi, Moscow region, 141701

A. Petrosyan

Space Research Institute; Moscow Institute of Physics and Technology (State University)

Email: zinyakov@phystech.edu
Rússia, Moscow, 117997; Dolgoprudnyi, Moscow region, 141701

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