Pitched blade turbine, flow simulation

Ranade, V. V., J. B. Joshi and A. G. Marathe, Flow generated by pitched blade turbines II simulation using k-e model, Chem. Eng. Comm., 81, 225-248 (1989). 

FIGURE 9.5 Simulated flow field for two alternative reactor configurations (red high values blue low values legend not shown due to confidentiality constraints), (a) Four pitched blade turbine, (b) two pitched blade turbine with cage (left vector plots right contours of turbulent kinetic energy.)... 

Shan X, Yu G, Yang C, Mao Z-S, Zhang W. (2008) Numerical simulation of liquid-solid flow in an unbaffled stirred tank with a pitched-blade turbine down flow. Ind. Eng. Chem. Res.,... 

Two impeller types were simulated the standard six-blade disk turbine and a 45° pitched blade turbine. The outflow from the disk turbine was simulated by fixing the tangential velocities at the blade tip locus (the FIX option in Fluent). The radial velocities and k/e ratios generated were close to the values that have been measured by Wu and Patterson (1989). The outflow velocities and turbulence energy from the pitched blade turbine were fixed at the bottom locus of the impeller blades using the data of Fort et al. (1999). The resulting flow patterns were close to the data measured. 

Fig. 13. Spatial distributions of bubble size in three vessels agitated by different impellers a classical Rushton turbine (DT), a hydrofoil impeller (A315) manufactured by Lightnin, and a Pitched Blade Impeller (PBT). The gas flow numbers in these simulations are in the range 0.01-0.02. These simulation results have been obtained by using GHOST Reproduced with permission from Bakker (1992).

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