Reynolds slurry rheology

While many process fluids are Newtonian, some are non-Newtonian (as seen in Figure 9.7). For such cases, it is not sufQcient to use a single value for viscosity to determine the impeller Reynolds number. Concentrated slurries are typically non-Newtonian and particle-size dependent. They are frequently shear-thinning. Dilatant behavior seldom occurs. If the system is simply shear thinning, it is usually possible to describe its rheological behavior with a simple power-law relationship ... 

For slurries exhibiting power-law fluid rheology, the transition velocity from laminar to turbulent flow is governed by the flow behaviour index n of the slurry. The equation proposed by Hanks and Ricks (1974) gives an estimate of this transition velocity in terms of the generalized Reynolds number Re. ... 

Figure 4.6 Friction factor as a function of Reynolds number and Hedstrom number for slurries exhibiting Bingham plastic rheology...

Input the rheology of the slurry to obtain the plasticity, Reynolds, or Hedstrom number based on the hydraulic radius of the flow. 

Resuspension velocities for one particular. slurry [117] in a f-in. gla.ss pipe are given in Table 4-11 together with the rheological pi operties [118] and the critical Reynolds number calculated with the resuspension velocity. ... 

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See also in sourсe #XX -- [ ]

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