Defining Physics and Conditions

The physics and conditions are specified as follows.

Click Select Modules in the Model Panel. The Physical Model Selection dialog box opens.
Select Cavitation and Turbulence modules, click Add.
Click Close, to close the Physical Model Selection dialog box.

Figure 11.343 - Adding modules

The boundary conditions are specified as follows.

Select inlet_inlet from the Boundaries list under Volumes in the Geometric Entities Panel.
Select Specified Total Pressure from the Flow drop-down list in the Model Tab of Properties Panel and enter the following:

Select User Select from the Output drop-down list under Flow and set Volumetric Flow Rate and Average Total Pressure as Yes.

Figure 11.344 - Inlet conditions

Select volute_outlet from the Boundaries list under Volumes in the Geometric Entities Panel.
Select Specified Volumetric Flux from the Flow drop-down list in the in the Model Tab of Properties Panel and enter the following:

Select User Select from the Output drop-down list under Flow and set Volumetric Flow Rate and Average Total Pressure as Yes.

Figure 11.345 - Outlet conditions

Select rotor_blades, rotor_bot, rotor_top and volute_rotating_walls from the Boundaries list under Volumes in the Geometric Entities Panel.
Select Rotating Wall from the Flow drop-down list in the Model Tab of Properties Panel and enter the following:

Select User Select from the Output drop-down list under Flow and set Power to Yes.

Figure 11.346 - Rotating Wall conditions

In Steady State Simulation, Non-inertial frame of approach is used to model impeller rotation.

Enter the parameters as follows:

Select rotor from Volumes in the Geometric Entities Panel.
Select Noninertial Frame from the Noninertial Frame drop-down list under Flow in the Properties Panel.
Enter the following under Noninertial Frame.
- Rotational Direction: Counterclockwise
- Rotational Speed: 2950 rpm
- Rotational Center: 0,0,0 m
- Rotational Axis Vector: 0, 1, 0

Figure 11.347 - Rotor Volume conditions

Select Volumes in the Geometric Entities Panel.
Select Model Tab in the Properties Panel.
Enter the Liquid Density as 998 kg/m³ for the Density in the Model Tab of Properties Panel.
Enter the Value as 0.001003 Pa-s for the Flow.

Figure 11.348 - Fluid properties