Directional and scale-dependent statistics of quasi-static magnetohydrodynamic turbulence
Directional and scale-dependent statistics of quasi-static magnetohydrodynamic turbulence
复制标题
准静态磁流体动力湍流的方向和尺度相关统计
DOI：
10.1051/proc/2011014
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
M.Farge
中科院分区：
文献类型：
--
作者：
N.Okamoto;K.Yoshimatsu;K.Schneider;M.Farge
利用三维正交小波分析研究了外加磁场下准静态磁流体湍流的各向异性和间歇性。小波是检查方向尺度相关统计的有效工具，因为它们基于空间、尺度和方向上的良好定位函数。将分析结果应用于5123栅格点直接数值模拟计算的两种不同外加磁场强度的MHD湍流流场。研究发现，外加磁场对流动的各向异性和间歇性的放大起着重要作用。
Anisotropy and intermittency of quasi-static magnetohydrodynamic (MHD) turbulence in an imposed magnetic field are examined, using three-dimensional orthonormal wavelet analysis. Wavelets are an efficient tool to examine directional scale-dependent statistics, since they are based on well-localized functions in space, scale and direction. The analysis is applied to two turbulent MHD flows computed by direct numerical simulation with 5123grid points and with different intensities of the imposed magnetic field. It is found that the imposed magnetic field plays an important role on the amplification of anisotropy and intermittency of the flow.