### 14.2.1. Boundary Basic Settings Tab

This tab sets the type, location, coordinate frame, and frame type (stationary or rotating) for each boundary condition as detailed in the following sections:

- Boundary Type

- Location

- Coordinate Frame

- Frame Type

- Profile Boundary Conditions

#### 14.2.1.1. Boundary Type

Inlet, outlet, opening, wall, and symmetry boundary conditions can be selected. Interface boundaries can be edited, but not created. For details, see Available Boundary Conditions in the CFX-Solver Modeling Guide.

#### 14.2.1.2. Location

You can choose the location of a boundary condition from a list containing all 2D composite and primitive regions. For details, refer to the following sections:

- Mesh Topology in CFX-Pre

- Boundary Condition and Domain Interface Locations

The drop-down list contains commonly used regions (all composite names and primitive names that are not referenced by any composites) and the extended list (displayed when clicking the Ellipsis icon ) contains all regions in a domain.

Tip:

- Hold the Ctrl key as you click to select multiple regions.

- With the Location drop-down list active, you can select regions by clicking them in the viewer with the mouse. This will display a small box containing the names of the regions that are available for selection.

#### 14.2.1.3. Coordinate Frame

Coordinate frames are used to determine the principal reference directions of specified and solved vector quantities in your domain, and to specify reference directions when creating boundary conditions or setting initial values. By default, CFX-Pre uses `Coord 0` as the reference coordinate frame for all specifications in the model, but this can be changed to any valid CFX-Pre coordinate frame. For details, see Coordinate Frames and Coordinate Frames in the CFX-Solver Modeling Guide.

#### 14.2.1.4. Frame Type

When the boundary condition is in a rotating domain, the Frame Type setting affects whether the conditions you specify on the boundary (pressure, velocity, and so on) are interpreted relative to the (rotating) domain (Frame Type set to `Rotating`) or relative to the absolute (stationary) frame of reference (Frame Type set to `Stationary`), from the point of view of absolute versus relative quantities.

For cases where there is relative motion between the coordinate frame and the boundaries, the boundary conditions are evaluated at the appropriate coordinate frame, either absolute or relative. The mesh coordinates are either rotated or counter-rotated at the boundary to match the coordinate frame. However, this is not true for the global coordinate frame (Coord 0).

For details, refer to the following sections:

- Cartesian Velocity Components in the CFX-Solver Modeling Guide

- Cylindrical Velocity Components

#### 14.2.1.5. Profile Boundary Conditions

This option is available only if profile data is loaded.

##### 14.2.1.5.1. Use Profile Data

Select Use Profile Data to define this boundary condition using an external profile data file, rather than using a value or expression. In order to do this, it is necessary to load the profile data file into CFX-Pre.

Note: If the points supplied in the profile data file do not geometrically overlap with the intended boundary mesh then there may be inaccuracies in the interpolation of profile data to the mesh.

###### 14.2.1.5.1.1. Initializing Profile Data

1. Select Tools > Initialize Profile Data.

   The Initialize Profile Data dialog box appears.

2. Click Browse.

3. Select the file containing your profile data.

4. Click Open. The profile data is loaded and the profile data name, coordinates, variable names and units are displayed.

   Note that if the path or filename are altered by typing in Data File the OK and Apply buttons will become unavailable. You must then click Reload to read the specified file and update the contents in the displayed profile data information.

5. You can enable the Visibility option to visualize the geometry of the profile shape to ensure that it is correctly aligned and scaled with the boundaries of the CFD model.

   When you enable the Visibility option in the Initialize Profile Data dialog box, or make the corresponding User Function visible, you can control the rendering properties of the profile geometry. The appearance of the profile shape will depend on the specified face connectivity.

   - If a profile file has face connectivity specified, in addition to nodal values, then the profile geometry will appear as faces.

   - If a profile file has no face connectivity, then the profile geometry will appear as points based on the nodes.

   For details, see Render Options in the CFX-Pre User's Guide.

   Note: This feature only supports profiles with three dimensions and three Cartesian spatial coordinates.

6. Click OK.

   Under the library section of the object tree, a new User Function object is generated for this profile function. The profile geometry will only be plotted once the Initialize Profile Data panel is applied and the corresponding user function has been created.

###### 14.2.1.5.1.2. Profile Boundary Setup

Choose from the Profile Name list and click Generate Values to apply. Check the settings on the other tabs to ensure that the correct CEL expressions have been set. For details on how to adjust these, see Interpolation (From File) User Functions.

Release 18.2 - © ANSYS, Inc. All rights reserved.