Fig. 3: Energy density and spectral energy density of flow.
From: Deviations from Taylor’s frozen hypothesis and scaling laws in inhomogeneous jet flows

a Energy density E(r, z) for a jet-flow of Re ≈ 78,000. b Decay of \(\hat{E}({k}_{r}=0,{k}_{z})\) as a function of kz. Each blue diamond represents the mean of \(\hat{E}({k}_{r}=0,{k}_{z})\) at four successive points and error bars, the associated standard deviations. Dashed line shows Kolmogorov–Obukhov scaling.