Conditions

This section explains the conditions related to the boundaries and the volume in a Ball Valve simulation.

The boundary conditions for a desired boundary are accessed as follows:

Geometric Entities Panel > Boundaries > [Desired boundary]

Properties Panel > Model Tab > Ball Valve > [Desired options]

The ball valve template has following boundary conditions:

Figure 6.605 - Ball Valve-Conditions

Cylinder: This corresponds to the boundaries along which the valve slides during its motion. This boundary should be of cylindrical shape. This boundary condition is automatically assigned during the Valve Template Mesher process.
Valve: This corresponds to all the moving surfaces.
Valve End: This corresponds to the end boundaries of a valve chamber.

Note: The Cylinder Surfaces, Valve and Valve End are the boundary conditions are set automatically while meshing under the valve template.

Inlet: This specifies the inlet flow boundary. A Specified Pressure Inlet is the preferred and default boundary condition in the Flow module for a valve Inlet boundary.

Note: Inlet boundary cannot be a part of a valve chamber. If a boundary functions as both an inlet and a boundary of the valve chamber, it should be assigned the valve function and subsequently set as an Inlet under the Flow module using Extended Mode.

Outlet: This specifies the outlet boundary. A Specified Pressure Outlet is the preferred and default boundary condition in the Flow module for a valve Outlet boundary.
Wall: This boundary condition specifies a wall boundary for the ball valve. This should only be used, if the boundary is not part of the valve chamber. If a boundary functions as both a Wall and a boundary of the valve chamber, that boundary should be assigned the valve function.

Note: The default values in each module under the template can be accessed and modified, by using the Extended Mode.

The Ball Valve template has following parameters assigned to the fluid volumes. The conditions for a desired volume are accessed as follows:

Geometric Entities Panel > Volumes > [Desired Volume]

Properties Panel > Model Tab > Ball Valve > [Desired options]

The template has additional conditions which apply to selected Volumes in the simulation under Ball Valve module. These below attributes apply to Volumes only. Each volume may be assigned specific independent attributes.

Material: The material properties can be set individually for selected volume under the appropriate modules using Extended Mode. The fluids available are Oil, Water, Air and User Defined.
Operating Conditions: The Operating Conditions provide direct access to the operating parameters and can be set individually under the appropriate modules using Extended Mode. The available operating parameters depend on the the active modules and models.

Figure 6.606 - Material properties

Output

Primary and Derived variables can be integrated over a selected boundary and stored in the ASCII format file filename_integrals.txt for subsequent Post-Processing. These data can also be displayed real-time in the GUI using the X-Y Plots feature. The quantities available for output depend on the boundary type as listed below:

The desired output can be activated for a selected boundary in the Model Tab of the Properties Panel. The outputs which can be activated are specified as User Select (Area, Normal). The valve related output variables are available under the Translation (1 DOF) module.

When monitoring Points are created as part of the simulation, the output quantities are stored in the ASCII format file filename_points.txt for subsequent Post-Processing.