Intermittency in drift-wave turbulence: structure of the momentum flux probability distribution function.
Intermittency in drift-wave turbulence: structure of the momentum flux probability distribution function.
复制标题
漂移波湍流的间歇性：动量通量概率分布函数的结构。
DOI：
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发表时间：
2002
影响因子：
8.6
通讯作者：
P. Diamond
中科院分区：
文献类型：
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作者：
Eun;P. Diamond
我们解析地计算了强迫长谷川- mima湍流的局部雷诺应力的概率分布函数（PDF）。假设PDF尾部是由模态解给出的空间形式的瞬间引起的，则发现R的PDF尾部是一个拉伸的非高斯指数，其具体形式为exp[-cR(3/2)] （c为常数）。我们将瞬时子的时间定位与动量输运事件的“爆发”程度联系起来。
We analytically compute the probability distribution function (PDF) of the local Reynolds stress ( R) for forced Hasegawa-Mima turbulence. With the assumption that the PDF tail is due to an instanton with the spatial form given by the modon solution, the tail of the PDF of R is found to be a stretched, non-Gaussian exponential, with the specific form exp[-cR(3/2)] ( c is a constant). We relate the temporal localization of the instanton to the degree of "burstiness" of the momentum transport event.