AI 中文总结
研究带状流漂移波湍流中小尺度下的各向异性和空间间歇性，采用二维方向连续小波变换，应用于修正长谷川-若谷模型涡度场，得出二阶矩在垂直带状流方向增强、空间间歇性在沿带状流方向更显著的结论。
AI 中文摘要
我们研究了带状流漂移波湍流中小尺度下的各向异性和空间间歇性。使用二维方向连续小波变换，其能在尺度、位置和方向上同时定位。该小波分析应用于修正的长谷川-若谷模型数值模拟得到的涡度场。方向小波统计表征湍流各向异性，二阶矩在垂直于带状流方向增强。空间间歇性在沿带状流方向更显著。
英文摘要
We examine anisotropy and spatial intermittency at small scales in drift-wave turbulence with zonal flows. We use a two-dimensional directional continuous wavelet transform, which allows simultaneous localization in scale, position, and direction. This wavelet analysis is applied to vorticity fields obtained from numerical simulations of the modified Hasegawa--Wakatani model, a reduced model of resistive drift-wave turbulence in magnetized plasmas with zonal flows. Directional wavelet statistics characterize the anisotropy of the turbulence. The second-order moment is enhanced around directions perpendicular to the zonal flow. Spatial intermittency, characterized by scale-dependent flatness, is more pronounced around directions along the zonal flow.
Comments21 pages, 10 figures
