Effect of the Tank Design on the Flow Pattern Generated with a Pitched Blade Turbine

The effect of the tank design on the hydrodynamic structure is carried out in three tanks; cylindrical tank, curved tank and spherical tank; equipped with a six-pitched blade turbine (PBT6). The hydrodynamic behaviour is numerically predicted by the resolution of the Navier-Stokes equations in conjunction with the Renormalization Group (RNG) of the k-ε turbulence model. These equations are solved by a control volume discretization method. The numerical results from the application of the CFD code Fluent with the Multi Reference Frame (MRF) model are presented in the impeller stream region. Particularly, the velocity components and the turbulent characteristics are presented in different planes containing the blade. The power consumption of these stirred tanks was calculated to choose the most effective system. The comparison between the numerical results and the experimental data showed a good agreement.