Micromixers segregation index

The experimental concentration lies somewhere between y and 1, as shown on figure 1 where theoretical lines are drawn together with some experimental points. How can we calculate a micromixing parameter from these observations The simplest approach is to define an empirical segregation index as (5)(8) ... 

Figure 14 shows a plot of the Dispersion Index DI = Mw/M wersus the conversion X of the monomer for segregated flow (S) and well micromixed flow (M). The dramatic influence of segregation can be noticed at high conversion, especially with transfer to polymer. Moreover, an interesting effect is observed with diluted and slow initiators, namely an inversion of the relative position of S and M curves when the transfer constant ktp is increased. 

Figure 15. Effect of segregation on polymerization of styrene in cyclohexane solution. Standard CSTR with h baffles and a 6-blade turbine, V = 670 cm, T = 75 °C. Dispersion Index DI vs. space time. Influence of agitation speed. Curves S (segregated flow) and M (well-micromixed flow) calculated from batch experiments. Initiator PERKAD0X l6, A = 0.033 mol L - -, kd = 5 x 10 5 s-1, f = 0.85 Mq = 6.65 mol L l, SQ = 2.22 mol IT1.

---