Run B. Turbulence with expansion and no mean field: spectra vs. kR (radial wavenumber, i.e., in direction parallel to the mean radial flow) at t = 0.8,1.2,...3.2 nonlinear times (vertical arrows indicate direction of time evolution). a) Total energy spectra compensated by k− 5/3; b) residual energy, compensated by k-2; c) residual energy normalized by the α = 1 prediction; d) residual energy normalized by the α = 2 prediction (see Eq. (15)).
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