Strong turbulence, self-organization and plasma confinement
Strong turbulence, self-organization and plasma confinement
复制标题
强湍流、自组织和等离子体约束
DOI：
10.1140/epjh/e2018-90033-4
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
K. Mima
中科院分区：
文献类型：
--
作者：
A. Hasegawa;K. Mima
抽象的
本文阐明了强磁场存在下二维流体的流体动力学模型与等离子体动力学简化模型之间的密切联系。关键要素是科里奥利力与洛伦兹力的相似性。简化的等离子体模型，即长谷川-美马方程，相当于二维离子涡旋方程。本文讨论了长谷川-美马模型的历史以及称为长谷川-若谷模型的相关简化系统的历史。利用二维流体↔磁化等离子体类比来论证磁化等离子体湍流表现出双重级联，包括能量的逆级联。还解释了等离子体中有序介观流（类似于区域射流）的产生。本文最后简要解释了准二维动力学与等离子体约束物理方面的相关性。
Abstract
This paper elucidates the close connections between hydrodynamic models of two-dimensional fluids and reduced models of plasma dynamics in the presence of a strong magnetic field. The key element is the similarity of the Coriolis force to the Lorentz force. The reduced plasma model, the Hasegawa–Mima equation, is equivalent to the two-dimensional ion vortex equation. The paper discusses the history of the Hasegawa–Mima model and that of a related reduced system called the Hasegawa–Wakatani model. The 2D fluid ↔ magnetized plasma analogy is exploited to argue that magnetized plasma turbulence exhibits a dual cascade, including an inverse cascade of energy. Generation of ordered mesoscopic flows in plasmas (akin to zonal jets) is also explained. The paper concludes with a brief explanation of the relevance of the quasi-2D dynamics to aspects of plasma confinement physics.