Transition from weak to strong turbulence in magnetized plasmas

Transition from weak to strong turbulence in magnetized plasmas
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磁化等离子体中从弱湍流到强湍流的转变

DOI:
10.1088/1367-2630/ab1148
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发表时间:
2019
影响因子:
3.3
通讯作者:
D. R. Hatch
D. R. Hatch
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
V. Bratanov;S. Mahajan;D. R. Hatch

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The scaling of turbulent heat flux with respect to electrostatic potential is examined in the framework of a reduced (4D) kinetic system describing electrostatic turbulence in magnetized plasmas excited by the ion temperature gradient instability. Numerical simulations were instigated by, and tested the predictions of generic renormalized turbulence models like the 2D fluid model for electrostatic turbulence (Zhang and Mahajan 1993 Phys. Fluids B 5 2000). A fundamental, perhaps, universal result of this theory-simulation combination is the demonstration that there exist two distinct asymptotic states (that can be classified as weak turbulence (WT) and strong turbulence (ST) states) where the turbulent diffusivity Q scales quite differently with the strength of turbulence measured by the electrostatic energy
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