Magnetohydrodynamic turbulence: Observation and experimenta)
Magnetohydrodynamic turbulence: Observation and experimenta)
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磁流体动力湍流：观察和实验a)
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
P. Weck
中科院分区：
文献类型：
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作者：
Michael R. Brown;D. Schaffner;P. Weck
我们提供了一个教程的范例和工具的磁流体动力学（MHD）湍流。主要范例是从大尺度到小尺度的湍流级联，导致磁波动EB（f）的频率功率谱的幂律行为。我们将描述五个有用的统计工具MHD湍流在时域：时间自相关函数，频率功率谱，时间增量的概率分布函数，时间结构函数，和排列熵。每一种方法都将以太阳风中的磁流体动力学波动为例加以说明。来自Wind卫星的单一数据集将用于说明所有五种时间统计工具。
We provide a tutorial on the paradigms and tools of magnetohydrodynamic (MHD) turbulence. The principal paradigm is that of a turbulent cascade from large scales to small, resulting in power law behavior for the frequency power spectrum for magnetic fluctuations EB(f). We will describe five useful statistical tools for MHD turbulence in the time domain: the temporal autocorrelation function, the frequency power spectrum, the probability distribution function of temporal increments, the temporal structure function, and the permutation entropy. Each of these tools will be illustrated with an example taken from MHD fluctuations in the solar wind. A single dataset from the Wind satellite will be used to illustrate all five temporal statistical tools.