Influence of equilibrium shear flow in the parallel magnetic direction on edge localized mode crash

Influence of equilibrium shear flow in the parallel magnetic direction on edge localized mode crash
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平行磁方向平衡剪切流对边缘局域模式碰撞的影响

DOI:
10.1063/1.4945646
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发表时间:
2016-04
期刊:
影响因子:
2.2
通讯作者:
Tang C. J.
Tang C. J.
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Luo Y.;Chen S. Y.;Huang J.;Xiong Y. Y.;Tang C. J.

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相似文献

利用BOUT++四场程序研究了平行剪切流对剥离-气球(P-B)模式演化的影响。平行剪切流在线性模拟和非线性模拟中的作用是不同的。在线性模拟中,Kelvin-Helmholtz项可以增加边缘局域模(ELM)的增长率,这可能是由平行剪切流引起的。在非线性模拟中,线性阶段的模拟结果与线性阶段的模拟结果雅阁。然而,ELM尺寸在湍流阶段的开始被平行剪切流减小,这被认为是P-B细丝结构。然后在湍流阶段,ELM尺寸被剪切流减小。
The influence of the parallel shear flow on the evolution of peeling-ballooning (P-B) modes is studied with the BOUT++ four-field code in this paper. The parallel shear flow has different effects in linear simulation and nonlinear simulation. In the linear simulations, the growth rate of edge localized mode (ELM) can be increased by Kelvin-Helmholtz term, which can be caused by the parallel shear flow. In the nonlinear simulations, the results accord with the linear simulations in the linear phase. However, the ELM size is reduced by the parallel shear flow in the beginning of the turbulence phase, which is recognized as the P-B filaments' structure. Then during the turbulence phase, the ELM size is decreased by the shear flow.
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