Frequency Distribution of Longitudinal Component of Turbulence

\frac{f \cdot S_{uu} (f \cdot z)}{σ_{u}^{2} (z)} = \frac{A \cdot f_{\dim}}{{(E + B \cdot f_{dim}^{C})}^{D}}

f	Frequency of velocity fluctuations
S_uu	Spectral density function
f_dim	Dimensionless frequency
A, B, C, D, E	Selectable constants, according to the specific model parameters

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