Impellers energy contours

FIGURE 9.10 Energy contours for different impellers (L-R) (top) small propeller, large propeller (bottom) Rushton turbine, Ekato-MIG. (Erom Todtenhaupt et al, 1991.)... 

Figures 18-36, 18-37, and 18-38 show some approaches. Figure 18-36 shows velocity vectors for an A310 impeller. Figure 18-37 shows contours of kinetic energy of turbulence. Figure 18-38 uses a particle trajectory approach with neutral buoyancy particles.

Fig 7.24. Sometimes it is more informative to present the corresponding speed or velocity magnitude quantity in a contour plot, for example to identify the location of the highest kinetic energy as shown in Fig 7.25 and Fig 7.26. Qualitatively the general flow field is described fairly well. The two main vortexes above and below the impeller can be identified and the highest speed occur at the impeller blade tips in agreement with the experimental observations. 

Figure 9.10 shows energy-dissipation contours for four impellers. The numbers represent fractions of the average energy input. It is important to understand energy distribution because it affects all processes requiring intensive mixing. This includes fast multipath chemical reactions, bubble and drop dispersion, and solids dissolution. Subsequent sections review these topics. 

FIGURE 12.8 Typical contours of kinetic energy of turbulence using a three-dimensional model with computational fluid dynamics of an axial flow impeller (A310). 

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