33.3.1 Multiphase Model Dialog Box

The Multiphase Model dialog box allows you to set parameters for modeling multiphase flow. See Sections  24.2.1- 24.4.2 for details.

Controls

Model   allows you to select one of four multiphase models.

Off   disables the calculation of multiphase flow.

Volume of Fluid   enables the VOF model described in this section in the separate Theory Guide. See Section  24.3 for details about using the model. This is available only with the pressure-based solver.

Mixture   enables the mixture model described in this section in the separate Theory Guide. See Section  24.4 for details about using the model. This is available only with the pressure-based solver.

Eulerian   enables the Eulerian model described in this section in the separate Theory Guide. See Section  24.5 for details about using the model. This is available only with the pressure-based solver.

Wet Steam   enables the wet steam model described in this section in the separate Theory Guide. See Section  24.6 for details about using the model. This is available only with the density-based solver.

Number of Eulerian Phases   allows you to specify the number of phases for the multiphase calculation. You can specify up to 20 phases.

Volume Fraction Parameters   contains parameters related to the VOF and Eulerian model. This section of the dialog box will appear only when Volume of Fluid or Eulerian is the selected Model.

Scheme   allows you to select the desired interface-tracking scheme.

Explicit   enables the Euler explicit scheme, described in this section in the separate Theory Guide. See Section  24.2.2 for more information.

Implicit   enables the implicit scheme, described in this section in the separate Theory Guide. See Section  24.2.2 for more information.

Courant Number   specifies the maximum Courant number allowed near the free surface. This item will not appear if the Implicit Scheme is selected. See Section  24.3.5 for details.

Open Channel Flow   enables the model to study the effects of open channel flow. See this section in the separate Theory Guide and Section  24.3.1 for details.

Open Channel Wave BC   enables the model to set specific parameters for a particular boundary for open channel wave boundaries. See this section in the separate Theory Guide and Section  24.3.2 for details.

Mixture Parameters   contains options related to the Mixture model.

Slip Velocity   enables/disables the calculation of slip velocities for the secondary phases as described in this section in the separate Theory Guide. See also Section  24.2.3.

Eulerian Parameters   contains options related to the Eulerian model.

Dense Discrete Phase Model   allows you to include the Dense Discrete Phase model (see Section  24.5.7 for details). Enabling this model automatically enables the DPM model.

Immiscible Fluid Model   allows you to include the Immiscible Fluid model (see Section  24.5.8 for details). The immiscible fluid model allows the modeling of nterface sharpening schemes and free surface flow.

Number of Discrete Phase   allows you to specify the number of discrete phases when the Dense Discrete Phase Model option is enabled.

Body Force Formulation   contains an additional option for body force calculations.

Implicit Body Force   enables the implicit body force treatment described in Section  24.2.5.

Note:   If you want ANSYS FLUENT to solve the volume fraction equation(s) at every iteration within a time step, use the text command:

define $\rightarrow$ models $\rightarrow$ multiphase $\rightarrow$

and select vof as the model. When prompted to solve vof every iteration?, enter yes.