To enable the VOF, mixture, or Eulerian multiphase model, select Volume of Fluid, Mixture, or Eulerian as the Model in the Multiphase Model panel (Figure 23.9.1).
Define Models Multiphase...
The panel will expand to show the relevant inputs for the selected multiphase model.
If you selected the VOF model, the inputs are as follows:
If you selected the mixture model, the inputs are as follows:
If you selected the Eulerian model, the input is the following:
To specify the number of phases for the multiphase calculation, enter the appropriate value in the Number of Phases field. You can specify up to 20 phases.