Defining Physics and Conditions

The physics and conditions are specified as follows.

Adding Modules

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

Figure 8.96 - Adding modules

Generating Operating Parameters

Select Propeller in the Model Panel.
Select Extended Mode for Setup Options in the Properties Panel.
Select Simulation Method to Steady (Multiple Reference Frame).
Enter Number of Blades as 3 under Pump Configuration list.
Specify Rotor Center as 0,0,0.
Enter the parameters for Angular Velocity Definition as follows:

Rotational Direction: Clockwise
Rotational Speed: 600 rpm
Rotational Axis Vector: 1,0,0

Figure 8.97 - Propeller operating parameters

Boundary Conditions

The boundary conditions are specified as follows:

Inlet

Select outside_dir1_min from the Boundaries list under Volumes in the Geometric Entities Panel.
Select Inlet from the Propeller drop-down list in the Model Tab of Properties Panel.
Select Specified Pressure Inlet from the Flow drop-down list.
Click Edit Expression icon in Pressure to open the Expression Editor dialog box .
The sample expression text is under Calculations for advance ratio, torque and thrust coefficient, the user needs to copy and paste the expressions written under Description drop-down list for Global Expressions editor of Simerics-MP+ as shown in Figure 8.98.
Click OK and enter p_init for the Pressure.
Specify Velocity(optional) under Velocity Profile as ux,0,0.

Note: The expressions specified also involve the calculations for the advance ratio (J), torque coefficient (K_Q) and thrust coefficient (K_T) of the propeller. For more information, refer to Propeller manual.

Figure 8.98 - Inlet conditions

The following expressions are added in the Expression Editor to calculate the above quantities:

Rotor

Select propeller from the Boundaries list in the Geometric Entities Panel.
Select Rotor from the Propeller drop-down list in the Model Tab of Properties Panel.

Note: The rotational parameters specified for Rotor boundary are same as the values defined under Propeller in the Model Panel. These values cannot be changed as indicated by blue font.

Figure 8.99 - Rotor conditions

Outlet

Select outside_dir1_max, outside_dir2_max, outside_dir2_min, outside_dir3_max and outside_dir3_min from the Boundaries list in the Geometric Entities Panel.
Select Outlet from the Propeller drop-down list in the Model Tab of the Properties Panel.
Select Specified Pressure Outlet from the Flow drop-down list.
Specify p_init for Pressure.
Specify Back Flow Velocity(optional) under Velocity Profile as ux,0,0.

Figure 8.100 - Outlet conditions

Fluid Properties

Select Volumes in the Geometric Entities Panel.
Select Model Tab in the Properties Panel.
Enter the parameters for Property list under Propeller as follows:

Material: Water
Dynamic Viscosity: 0.001003 Pa-s
Density: 998 kg/m³
Liquid Bulk Modulus(B0): 2.15e+09 Pa
Liquid Reference Pressure: 101325 Pa
Saturation Pressure: 3610 Pa

Enter the parameters for Operating Conditions as follows:

Gas Mass Fraction: 2.3e-05
Operatting Temperature: 300 K

Figure 8.101 - Fluid Properties