24.2.1 Enabling the Multiphase Model

To enable the VOF, mixture, or Eulerian multiphase model, select Volume of Fluid, Mixture, or Eulerian as the Model in the Multiphase Model dialog box (Figure  24.2.1).

Models Multiphase Edit...

Figure 24.2.1: The Multiphase Model Dialog Box

The dialog box will expand to show the relevant inputs for the selected multiphase model.

If you selected the volume of fluid (VOF) model, the inputs are as follows:

• number of phases

• volume fraction scheme (explicit or implicit) (see Section  24.2.2)

• (optional) inclusion fo open channel flow

• (optional) inclusion of open channel wave boundary conditions

• (optional) inclusion of the implicit body force formulation (see Section  24.2.5)

If you selected the mixture model, the inputs are as follows:

• number of phases

• (optional) inclusion of slip velocities (see Section  24.2.3)

• (optional) inclusion of the implicit body force formulation (see Section  24.2.5)

If you selected the Eulerian model, the inputs are as follows:

• number of phases

• volume fraction scheme (explicit or implicit) (see Section  24.2.2)

• (optional) inclusion of the dense discrete phase model

• (optional) inclusion of the immiscible fluid model

To specify the number of phases for the multiphase calculation, enter the appropriate value in the Number of Eulerian Phases field. You can specify up to 20 phases.