关键词: 连续高速分散混合器, 计算流体力学, 数值模拟

Abstract: The hydrodynamic characteristics in a continuous rotor-stator mixer (CRS) were numerically simulated by using computational fluid dynamics (CFD) package FLUENT 6.2 with the SIMPLE algorithm in this work. The standard k-e model and sliding mesh (SM) method were used in the simulation. The power number NP was constant with variation of Reynolds number Re, and the calculated NP equaled 5.99, the calculation error was 13.7% compared with the experimental value. The hydraulic characteristics under the lower flow rate conditions predicted by CFD are in good agreement with experimental data, though they are unable to be predicted reasonably under the larger flow rates because of the liquid entrainment. The results show that the maximum efficiency of the pumping capacity of CRS is only about 13%, and the power consumption is mainly used for high shear mixing. The predicted flow field and the distribution of shear rate are asymmetric, and each stator slot has a different circulation and re-entrainment pattern as the rotor is passing by the stators, which is in agreement with the literature. The results are of reference to the optimum design of industrial CRS.

Key words: continuous rotor-stator mixer, computational fluid dynamics, numerical simulation