Agreement with Experiment in General

Abrahamsen and Allen (1986) compiled a large number of experimental grade-efficiency data, and plotted them against the square root of a parameter Saa, defined as  

They evaluated the particle terminal slip velocity in CS, using the 

The points in Fig. 5.3.1 are experimental G-E (grade efficiency) data for the system described in the caption of Fig. 5.2.2. These data were generated in the laboratory of one of the authors. The tail at very fine particle sizes, where the efficiency increases with decreasing particle size, has nothing to do with the separation characteristics of the cyclone. Such a tail is a fairly common observation. In this case the tail exists for particle sizes less than about 0.5 to 0.6 /am, and is probably due to insufficient dispersion of the very fine particles of the feed solids. 

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