NonNewtonian fluid flow field in a 4PBT stirred reactor based on PIV
                                                                                SUN Xianpeng
（Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China）

Abstract: Aiming at the mixing efficiency of nonNewtonian fluids in a mechanical stirred reactor, the flow field characteristics of nonNewtonian fluids in a mechanical stirred reactor were studied. The noncontact flow field measurement particle image velocimetry technique was applied to measure the flow field of nonNewtonian fluids in a four pitch blade turbine stirred reactor of experimental scale. The effects of different concentration and stirring speed on the flow field distribution in a mechanical stirred reactor were discussed and analyzed. The results indicate that the stirring speed not only affects the convection intensity between fluids, but also changes the flow field structure of fluids. Solution concentration has little influence on the flow field pattern, but it affects the size of the high velocity region in the lower part of the impeller and the maximum velocity of the fluid.

Key words: stirred reactor; nonNewtonian fluid; flow field; particle image velocimetry(PIV)