Nonlocal bottleneck effect in two-dimensional turbulence

Details Nonlocal bottleneck effect in two-dimensional turbulence Nonlocal bottleneck effect in two-dimensional turbulence

1998-07-07

arxiv.org/abs/chao-dyn/9807012v1

Nonlinear Sciences

Chaotic Dynamics

4 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.81.4855

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.

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