Spectral model predictions of mean-square-shear distortion rates

It is possible to use a simple shear spectral model to produce some estimates of the mean-square velocity difference over given values of delta z. The distortion of a fluid region (a wake cross section, say) of dimension L is clearly due to velocity differences over delta z equal to L and smaller. The behavior of velocity differences over delta z with a simple model for the shear spectral density function is explored.