Dispersion parameters characteristic time scale

Now that we know how to estimate the size fx of the smallest scales of turbulence, it is simple to conclude by summing up the principles that govern mixing and chemical reactions in a flow with homogenous turbirlence. Table 11.1 shows, for a chemical reaction, for micromixing (molecular diffusion), and for macromixing (dispersion at different scales), the characteristic times and the scales with which these various processes are associated. For a stirred reactor, the phenomenon involves six parameters of different nature ... 

This shows a great progress in maintainability, which can be observed by the decrease of time restore dispersion (higher shape parameter) and huge reduction in characteristic restore time (lower scale parameter). 

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