Examples of mixing plant calculations
Mixing pasty media of complex rheology: practice

Determine the geometrical and operating characteristics of a stirrer capable of homogenizing a viscoelastic rheofluidifying pasty medium in a 0.8 m³ reactor in 10 min, and keeping it isothermal. Extrapolation of this operation to a 12 m³ reactor.

Properties of the pasty medium at process temperature: ρ = 1,000 kg · m^-3; λ = 0.6 W · m^-1 · K^-1; c_p = 4,180 J · kg^-1 · K^-1; Carreau parameters (measured between 0.1 and 100 s^-1) η₀ = 2,000 Pa · s (η_∞ negligible); n = 0.3; t_BC = 9.47 s; characteristic elasticity time extrapolated to zero gradient