The Metzner and Reed Approach

The Metzner and Reed approach has become a classical method of dealing with time-independent non-Newtonian fluids. It has been extended to Bingham slurries but the opinion of the author is that this approach is fairly difficult to use for Bingham slur-... 

The Metzner and Reed approach requires the engineer to assume a value of the shear stress at the waU to calculate x. Such assumptions are very difficult to make for engineers outside a research lab. It may be more practical to send samples of the slurry to a rheology lab and to go from plots of yield stress versus weight concentration, as well as from plots of viscosity versus weight concentration and shear rates to a more straightforward computation of friction factors (Figure 5-3). 

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