Origin of the "-1" spectral law in wall-bounded turbulence

The existence of the "-1" spectral law in wall turbulence is explained by the effect of superposition of Kolmogorov's eddy cascades generated at all possible distances from the wall, within an equilibrium layer. This concept is justified using only the well-known properties of wall-bounded flows. The presence of coherent structures appears to be not essential for the inverse-power law. The model predicts the -1 scaling for the range (1/H) less than or equal to k less than or equal to:(1/z), which agrees very well with the measurements (k is the wave number, H is the external scale of the flow, and,z is the distance from the wall).