24.5.7 Including the Dense Discrete Phase Model

If you are using the Eulerian multiphase model (Section  24.5), you have the option of including the Dense Discrete Phase Model ( this section in the separate Theory Guide).

This model is only available with the Eulerian multiphase model. Enabling this model automatically enables the DPM model. You will notice that Interaction with Continuous Phase in the Discrete Phase Model dialog box is enabled.

The required work flow when using the dense discrete phase model is as follows:

1.   Set up the Multiphase Model dialog box (Figure  24.5.5) to include the dense discrete phase model parameters.

Models Multiphase Edit...

Figure 24.5.5: The Dense Discrete Phase Model

(a)   Enable Dense Discrete Phase Model under Eulerian Parameters.

(b)   Set the Number of Discrete Phases that are present in your case.

2.   Open the Phases task page, in order to define the phases.

Phases

(a)   Define the discrete phase, by selecting the phase from the Phases selection list that is labeled Discrete Phase and clicking the Edit... button. Then set up the properties in the Discrete Phase dialog box that opens, as shown in Figure  24.5.6.

Figure 24.5.6: The Discrete Phase Dialog Box

Note that no additional inputs are required here (since the material is set automatically in the background, and the diameter is part of the solution).

(b)   Define the primary and secondary phases, as described in Section  24.5.2.

3.   Define the injections using the Injections dialog box.

Define $\rightarrow$ Injections...

(a)   Create a new injection by clicking the Create button in the Injections dialog box, or edit an existing injection by selecting the injection from the Injections list and clicking the Set... button. The Set Injection Properties dialog box will open (Figure  24.5.7).

Figure 24.5.7: The Set Injection Properties Dialog Box

(b)   Select the discrete phase from the Discrete Phase Domain drop-down list.

4.   Define the material properties for each injection.

Materials

Defining a Granular Discrete Phase

To define a granular (i.e., particulate) discrete phase in an Eulerian multiphase calculation, perform the following steps:

1.   Select the phase (e.g., Discrete Phase) in the Phases list.

2.   Click Edit... to open the Discrete Phase dialog box (Figure  24.5.8) .

Figure 24.5.8: The Discrete Phase Dialog Box for a Granular Phase

3.   In the Discrete Phase dialog box, enter a Name for the phase.

4.   Enable the Granular option.

You can now define the discrete phase in a similar manner to that described in Section  24.5.2.