Segregation
Figure 10 shows the boxplots of the segregation data (specifically, the percentage mass of the more massive species) for both the fast and turbulent fluidized beds. The particle mixtures were either binary mixtures or broad PSDs. Compared to the fast fluidized bed, the turbulent bed exhibited a greater spread of segregation extents. Interestingly, although the null hypotheses were rejected for cluster and flux characteristics, the null hypothesis cannot be rejected for the segregation datasets at the 95% confidence level, indicating that there is no significant difference between the means of the two populations. The similarity is surprising because segregation is driven by granular temperature 31,32, whereby larger particles dissipate more than smaller particles, and it was expected that the dissipation would be more significant in the fast fluidized bed wherein collisional stress was greater.