 Obukhov-Corrsin theory

Obukhov-Corrsin theory concerns transfer of scalar variance across scales in turbulent mixing. In the inertial-convective range, a constant scalar-variance flux and an eddy turnover time ${ϵ}^{-1/3}{r}^{2/3}$ predict the displayed second-order scalar structure function. It assumes a passive scalar, local transfer, approximate statistical equilibrium and separation from the molecular diffusion and forcing scales.