CFD Simulation of Power and Mixing Time for a Rushton Turbine in a Baffled-Tank Reactor

The flow field, power consumption and mixing time in a standard baffled stirred tank with 6-blade Rushton turbine over a range of Reynolds numbers was simulated using computational fluid dynamics (CFD). The flow field calculations were performed using a time dependent sliding mesh (SM) technique. Mixing time was simulated by injecting a tracer from top of the tank and recording concentration of species at a specific location in probe installation point. The Large Eddy Simulation (LES) as a turbulent model was used, and the effect of grid density was examined by repeating calculation with higher mesh density. Power number and velocity profile between these two grids were compared with reported results. Results of power number and flow field show very good agreement. There are in fairly reasonable agreements with the reported values of predicted mixing time in the literature at the similar conditions.

کلیدواژه ها:

CFD ، Stirred Tank ، Mixing Time ، Power ، LES