Abstract:Based on the significance of investigating the fluids characteristics in agitator, the complex flow field of a lab-scaled agitator of 1L was numerically simulated using standard k-epsilon turbulence model and Euler-Euler method. VOF model was used to capture the air-liquid free surface. The dynamic behaviors were resolved by discrete phase zero equation. The investigation results indicated that the baffle could avoid the vortex effectively, and the internal flow field within the agitator was constructed by upper and downward circulating flow. The velocity of the downward circulating region was higher than the upper region. The fluids velocity had a positive correlation with the stirring intensity. Within a limited range of particle size, the velocity of particles had a positive correlation with its size but with a small difference. The solid volume fraction distribution of smaller size was much evener than the bigger. Also increasing the stirring intensity could improve the dispersing performance. Thus, the numerical simulation of the flow field in agitator could improve the working efficiency by providing theory guide and technical base.