The standard k ε model has been employed to predict the turbulent flow generated by pitched blade turbines in a cylindrical baffled vessel. The effect of D/D T and C/D T on the three dimension flow in the stirred tank has been studied as well. The model prediction shows that the mean circulation loop for low impeller off bottom clearance is a single circulation loop. As the off bottom clearance is increased, the radial flow is enforced, and a secondary circulation loop forms close to the t...