Study of the flow field of a new fishtail-type stirring impeller in a stirred tank.

• Numerical analysis of the performance of a new fishtail-type stirrer. • PIV experiments validate the correctness of the model. • Compared to the RT impellers, fishtail impeller reduce power consumption by 16.4 %. • Compared to the RT impeller, fishtail impellers are effective in reducing mixing times and increasing mixing efficiency. • The fishtail impeller increases the pumping flow by 13.5 % and the pumping efficiency by 27.66 % compared to the RT impeller. In this study, a new fishtail impeller was introduced to improve the mixing of fluids in the stirred tank. The validity of the numerical model was first demonstrated by PIV experiments. Secondly, the CFD technique was used to analyze and predict the flow field characteristics in the stirred tank. Also, the effect of blade inclination on the mixing effect is analyzed. Finally, a comparative Analysis with the whale tail impeller is carried out to demonstrate the superiority of this research work. The results show that The results of the study showed that the power number of the fishtail impeller was reduced by 16.4 % compared to the RT impeller. The pumping efficiency of the fishtail impeller was increased by 25.52 %. The results also show that increasing the blade inclination increases the turbulent kinetic energy in the stirred tank. Comparative analysis with the whale-tail impeller reveals that the power number of the fish-tail impeller is reduced by 17.2 % and the pumping efficiency is increased by 19.97 %. [Display omitted] [ABSTRACT FROM AUTHOR]