Interplay between fluctuation driven toroidal axisymmetric flows and resistive ballooning mode turbulence

被引：8
|
作者：
Seto, H. [1 ]
Xu, X. Q. [2 ]
Dudson, B. D. [3 ]
Yagi, M. [1 ]
机构：
[1] Natl Inst Quantum & Radiol Sci & Technol, Rokkasho, Aomori 0393212, Japan
[2] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[3] Univ York, York Plasma Inst, Dept Phys, York YO10 5DD, N Yorkshire, England
来源：
PHYSICS OF PLASMAS | 2019年 / 26卷 / 05期
关键词：
PLASMA; SIMULATION; CONFINEMENT; GEOMETRY; PHYSICS; SHEAR; POWER;
D O I：
10.1063/1.5086998
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：
An interplay between fluctuation driven toroidal axisymmetric flows (convective cell modes) and resistive ballooning mode turbulence after the pedestal collapse is numerically studied by a four-field reduced MHD model in the BOUT++ framework. The strong flow shear suppresses the radial transport of pressure filaments, and the pressure profile in the pedestal region is partially recovered. As a result, a secondary instability is quasilinearly excited, which yields a secondary collapse. The subsequent damped oscillation is also analyzed by phase diagram analysis. Published under license by AIP Publishing.
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页数：15
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