Viscosity, and volumetric

Using Eq. (8), the viscosity of the suspension is determined from the broth viscosity and volumetric concentration of solids. 

In Figure 1-4 of Chapter 1, the relationship between dynamic viscosity and volumetric concentration was presented. In fact, the industry has accepted the criterion that friction losses are highly dependent on slurry viscosity in cases where the average particle diameter is finer than 40-60 microns, and (depending on the specific gravity) at volumetric concentrations in excess of 30%. 

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