Computational Fluid Dynamics of Fluid Mixing by using the Vertical Impeller Axis and Inclined Impeller Axis
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Abstract
This study aims to research the characteristics of mixing between slurry with water and efficiency calculate in a tank agitated by an impeller that inclined itself and vertical axis impeller obtained from forming with air foil coordinates. This research predicted of agitation within the optimum mixing area for the chemical industry. Research methods featured design, analysis, and calculation for mixing time by the computational fluid dynamics technique for free surface calculation. The important variables in this research were impellers that inclined itself and vertical axis impeller with an impeller diameter of 400 mm. The rotations of impeller in this research are 50, 100, 150, 200, 250 and 300 rpm. The results of the research showed that the inclined impeller could reduce mixing time compared to that obtained by the vertically axis impeller in turbulence flow region. The effect of eccentric position of inclined impeller on mixing time was also studied and a significant reduction of mixing time was observed. To confirm the experimental results in this research, the results of velocity profiles were calculated numerically and two novel numerical simulation methods were proposed. According to this research, it can be used for the improvement of higher performance, and it would be needed for development of better agitation turbine system.
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