Role of magnetic shear in large-scale structure formation in electron temperature gradient driven turbulence

被引：23
|
作者：
Li, JQ [1 ]
Kishimoto, Y
机构：
[1] SW Inst Phys, Chengdu 610041, Peoples R China
[2] JAERI, Naka Fus Res Estab, Naka, Ibaraki 3110193, Japan
[3] Kyoto Univ, Dept Fundamental Energy, Uji 6110011, Japan
来源：
PHYSICS OF PLASMAS | 2005年 / 12卷 / 05期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1063/1.1897386
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
Formation of secondary large-scale structures in electron temperature gradient (ETG) driven turbulence is investigated based on modeling analyses and three-dimensional gyrofluid turbulence simulations. What state the system evolves to, zonal flow dominated or streamerlike, depends on the spectral anisotropy of ETG turbulence. The radially elongated turbulent fluctuation tends to excite a zonal flow instability, while the poloidally elongated one favors to enhance the streamer formation. The magnetic shear is identified to play a key role in the structure selection through governing the anisotropy of ETG turbulent structures. (c) 2005 American Institute of Physics.
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页码：1 / 4
页数：4
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