A water/air model was developed to simulate the refining of molten aluminium by the sparging of gas through an impeller.
The optimal gas dispersion depends upon selecting the correct gas rate for a given impeller rotational velocity to prevent
flooding or channelling. Correlations illustrating this flooding behaviour exist for standard impellers within standard tank
geometries. However the validity of these correlations has not been substantiated for gas dispersion in high temperature
molten metals with non-standard tank and impeller dimensions.