论文标题
关键平衡和MHD湍流的物理
Critical Balance and the Physics of MHD Turbulence
论文作者
论文摘要
提出了对湍流现象中采用的关键平衡概念的优势和局限性的讨论。不可压缩的磁流失动力（MHD）情况是一个特殊的重点。讨论强调了原始的Goldreich＆Sridhar（1995）相对于相关的理论问题和模型在血浆湍流中相关的理论问题和模型。所检查的问题包括方差和光谱各向异性，平均磁场的影响，局部和非局部性效应以及外部驾驶影响的潜力。相关模型（例如减少的MHD）在考虑因素中提供了宝贵的背景。讨论过程中提出了一些有关光谱特征和时间表的新结果。还简要提到的是一些临界平衡的一些适应和变化。
A discussion of the advantages and limitations of the concept of critical balance, as employed in turbulence phenomenologies, is presented. The incompressible magnetohydrodynamic (MHD) case is a particular focus. The discussion emphasizes the status of the original Goldreich & Sridhar (1995) critical balance conjecture relative to related theoretical issues and models in an MHD description of plasma turbulence. Issues examined include variance and spectral anisotropy, influence of a mean magnetic field, local and nonlocal effects, and the potential for effects of external driving. Related models such as Reduced MHD provide a valuable context in the considerations. Some new results concerning spectral features and timescales are presented in the course of the discussion. Also mentioned briefly are some adaptations and variations of critical balance.
