Stirred Tank Modeling Using the Actual Impeller Geometry

5-5 STIRRED TANK MODELING USING THE ACTUAL IMPELLER GEOMETRY 

To model the geometry of the impeller exactly, a 3D simulation must be performed. A number of solution approaches are available to incorporate the motion of the impeller, and the computational grid used must be able to adapt to the solver method employed. The models in popular use today are reviewed in the following sections. Particular attention is paid to the sliding mesh model, the most rigorous of them all. The solver methods described are aU designed to capture the motion of a rotating impeller in a stationary tank, but they vary in accuracy. Three of the models are steady-state and one is time-dependent. 

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