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.
Progressive is automatically added to the Model Panel by the Rotor Template Mesher.
Select Cavitation under Available Modules and click Add.
Click Close to close the Physical Model Selection dialog box.

Figure 6.868 - Adding modules

Select Progressive in the Model Panel.
Enter Number of Revolutions and Time Steps Per Cavity Rotation as 3 and 180 respectively for the Time Definition in the Model Tab of Properties Panel.
Enter the parameters for the Angular Velocity Definition as follows:
- Rotational Direction: Clockwise
- Rotational Speed: 1000 rpm
- Rotational Axis Vector: 0, 0, 1

Figure 6.869 - Operating parameters

The boundary conditions are specified as follows:

Select inlet_inlet from the Boundaries list under Volumes in the Geometric Entities Panel.
Select Inlet from the Progressive drop-down list in the Model Tab of Properties Panel.
Enter Inlet Pressure as 101325 Pa.

Figure 6.870 - Inlet conditions

The boundary conditions to rotor and stator are automatically assigned by the Progressive module.
Click rotor Boundaries list in the Geometric Entities Panel. Check the values under the Model Tab of Properties Panel.
The values for the rotor are the same as specified under Progressive in the Model Panel.

Figure 6.871 - Rotor conditions

Select outlet_outlet from the Boundaries list in the Geometric Entities Panel.
Select Outlet from the Progressive drop-down list in the Model Tab of Properties Panel.
Enter Outlet Pressure as 300000 Pa.

Figure 6.872 - Outlet conditions

Select Volumes in the Geometric Entities Panel.
Select Model Tab in the Properties Panel.
Enter the parameters for Property list as follows:
- Material: Oil
- Dynamic Viscosity: 0.007 Pa-s
- Density: 800 kg/m³
- Liquid Bulk Modulus(B0): 1.5e09 Pa
- Liquid Reference Pressure: 101325 Pa
- Saturation Pressure: 400 Pa
Enter the parameters for Operating Conditions list as follows:
- Gas Mass Fraction: 9e-05
- Operating Temperature: 300 K
- Starting Pressure: 101325 Pa

Figure 6.873 - Fluid properties