Large Eddy Simulation of Mixing Process in Stirred Tank with Rushton Turbine

Large eddy simulation(LES) of mixing process in a stirred tank of 0.476 m diameter with a standard Rushton turbine were reported.The turbulent flow field and mixing time were calculated using LES with Smagorinsky-Lilly sub grid scale model.The impeller was modeled using the sliding mesh technique.Better agreement of mixing time is obtained between the experimental results and prediction by LES than that by the traditional Reynolds-averaged Navier-Stokes(RANS) approach. The response curve of tracer predicted by LES is in a good agreement with the experimental results.The results show that LES is a good approach to investigate unsteady and quasi-periodic behavior of the turbulent flows in stirred tanks.