Nonlocal bottleneck effect in two-dimensional turbulence

Abstract

The bottleneck pileup in the energy spectrum is investigated for several two-dimensional (2D) turbulence systems by numerical simulation using high-order diffusion terms to amplify the effect, which is weak for normal diffusion. For 2D magnetohydrodynamic (MHD) turbulence, 2D electron MHD (EMHD) turbulence and 2D thermal convection, which all exhibit direct energy cascades, a nonlocal behavior is found resulting in a logarithmic enhancement of the spectrum.

4 pages, 5 figures

References in corpus (3)

• Bottleneck effects in turbulence: Scaling phenomena in r- versus p-space
• Non-linear supersymmetric Sigma-Model for Scalar Classical Waves
• Kolmogorov's law for two-dimensional electron-magnetohydrodynamic turbulence

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• Current-sheet formation in incompressible electron magnetohydrodynamics