Anisotropic velocity correlation spectrum at small scales in a homogeneous turbulent shear flow.
Anisotropic velocity correlation spectrum at small scales in a homogeneous turbulent shear flow.
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DOI：
10.1103/physrevlett.88.154501
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发表时间：
2002-03
影响因子：
8.6
通讯作者：
T. Ishihara;K. Yoshida;Y. Kaneda
中科院分区：
文献类型：
--
作者：
T. Ishihara;K. Yoshida;Y. Kaneda
简单的理论分析和512（3）网格点上的直接数值模拟表明，在高雷诺数下，均匀剪切湍流惯性子区的速度相关谱张量可以用一种简单的形式给出，即波矢的各向异性函数。张量由平均流的应变张量速率、单位质量的能量耗散速率、波矢量和两个无量纲常数决定。
A simple theoretical analysis and direct numerical simulations on 512(3) grid points suggest that the velocity correlation spectrum tensor in the inertial subrange of homogeneous turbulent shear flow at high Reynolds number is given by a simple form that is an anisotropic function of the wave vector. The tensor is determined by the rate of the strain tensor of the mean flow, the rate of energy dissipation per unit mass, the wave vector, and two nondimensional constants.