MHD Turbulence: Nonlocal, Anisotropic, Nonuniversal?
MHD Turbulence: Nonlocal, Anisotropic, Nonuniversal?
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MHD 湍流：非局域、各向异性、非普遍？
DOI：
10.1007/978-1-4020-6472-2_52
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发表时间：
2008
影响因子：
--
通讯作者：
T. A. Yousef
中科院分区：
文献类型：
--
作者：
A. Schekochihin;S. Cowley;T. A. Yousef
柯尔莫哥洛夫的湍流理论和哲学基于许多假设，这些假设已成为许多系统（包括非流体动力系统）中处理湍流的标准概念。然而，事实证明，在 MHD 湍流中，尺度空间中相互作用的局部性、小尺度的各向同性甚至普遍性都不能被视为理所当然，事实上，可能会被证明是失败的。本文结合简单的物理推理和数值证据，重点关注 MHD 湍流的这些非常规方面以及小型发电机的相关现象。
Kolmogorov’s theory and philosophy of turbulence are based on a number of assumptions that have become standard notions with which one approaches turbulence in many, including non-hydrodynamic, systems. However, it turns out that in MHD turbulence, locality of interactions in scale space, isotropy of small scales or even universality cannot be taken for granted and, in fact, can be shown to fail. This note focuses on these unconventional aspects of MHD turbulence and on the related phenomenon of small-scale dynamo using a combination of simple physical reasoning and numerical evidence.