AbstractMany metallurgical processes involve multiphase flows and liquid metal processing is not an exception. During the secondary refining, and casting of steel, there are many interactions between the liquid phase, and the dispersed phases (spherical gas bubbles, inclusions, liquid slag droplets etc.). To mathematically model these operations, the Discrete Phase Method (DPM) is now being used by significant number of researchers. However, in certain publications, the equations presented are ambiguous but have nonetheless been referenced by many researchers. The present technical note highlights a mistake in the interpretation of the discrete phase equation in a technical paper by Hulstrung et al. 1 and also points out the mis‐leading equation in the ANSYS‐FLUENT 12.0 theory guide 2.