Spectral modelling of homogeneous non-isotropic turbulence
Spectral modelling of homogeneous non-isotropic turbulence
复制标题
均匀非各向同性湍流的谱模型
DOI：
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发表时间：
1981
影响因子：
3.7
通讯作者：
J. Mathieu
中科院分区：
文献类型：
--
作者：
C. Cambon;D. Jeandel;J. Mathieu
本文介绍了一种计算具有常平均速度梯度的均匀各向异性湍流场的方法。三重速度关联的傅里叶变换方程是用扩展的涡阻尼准正态近似封闭的。引入了二阶谱张量的角参数化，以便在球壳上解析地积分所有方向项。对典型的均质各向异性流动，给出了模型的数值解。
The paper describes a method to calculate homogeneous anisotropic turbulent fields associated with a constant mean velocity gradient. The equations governing the Fourier transform of the triple velocity correlations are closed by using an extended eddy-damped quasi-normal approximation. An angular parametrization of the second-order spectral tensor is introduced in order to integrate analytically all the directional terms over a spherical shell. Numerical solutions of the model are presented for typical homogeneous anisotropic flows.