Effect of baffle arrangement on turbulent flow field in a stirred tank

Turbulent flow in a baffled mixing tank stirred by an impeller was simulated using CFD. The effect of baffle angles with respect to the vertical direction and position of baffle with respect to the tank wall on flow and turbulent properties has been studied. Multiple reference frame (MRF) technique was used for calculations. In this method flow field is divided into two parts, the inner part co-rotating with the impeller and outer part which is fixed. It was found that baffle edge has considerable effect on some flow parameters such as velocity magnitude, turbulent energy dissipation rate and turbulent kinetic energy.

Keywords:

stirred tank , CFD , turbulent flow , baffle , MRF method