Post Mixing Optimization and Solutions

Macro Mixing - Fluid Motion

Pumping, Flow Patterns

Macro level mixing - Physical processing

Fluid Motion Mixing is about the description of fluid flow generated by an impeller. Macro-level mixing topics covered here are flow patterns , velocity profiles, velocity gradients, shear rates and distribution, turbulence spectrum, energy dissipation, pressure gradients, and impeller power consumption. Methodologies to measure these are also discussed. Many of these characteristics change with the flow regime, so the discussion of the effects of laminar, transitional, and turbulent flow regimes also belongs here. Obviously, the Reynolds-number, Re, is a main parameter that describes these changes. Since Re is a function of viscosity, the discussion of the viscous properties of the fluids and slurries are also discussed here and how they affect mixing. Many other dimensionless numbers are mentioned here, too, such as the power number, Np, the flow number, Nq, and the head number, Nh. You could call this area - Basic Mixing Principals. Some processes are designed merely on the basis of its pumping capacity, its flow pattern, or the degree of shear produced.

Without baffles, most impellers styles impose a tangential flow pattern. With baffles, most impellers show their true flow characteristics.

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