Inverse energy cascade in stationary two-dimensional homogeneous turbulence.
Inverse energy cascade in stationary two-dimensional homogeneous turbulence.
复制标题
静止二维均匀湍流中的逆能量级联。
DOI：
10.1103/physrevlett.72.1475
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发表时间：
1994
影响因子：
8.6
通讯作者：
Vadim Borue
中科院分区：
文献类型：
--
作者：
Vadim Borue
采用10242分辨率的直接数值模拟方法，研究了小尺度高斯时白噪声驱动下稳态均匀二维湍流中逆能量级联的统计特性。逆能量级联的能谱与预期的k−5/3定律有很大的偏离，与k−3接近（有些平坦）。这种偏差的原因可以追溯到分布在所有尺度上的强涡的出现。探讨了涡旋的统计性质。
Direct numerical simulations with up to 1024 2 resolution are performed to study statistical properties of the inverse energy cascade in stationary homogeneous two-dimensional turbulence driven by small-scale Gaussian white-in-time noise. The energy spectra for the inverse energy cascade deviate strongly from the expected k− 5/3 law and are close (somewhat flatter) to k− 3. The reason for the deviation is traced to the emergence of strong vortices distributed over all scales. Statistical properties of the vortices are explored.