If you model the problem domain as a subset of the complete geometry using symmetry or periodic boundaries, you can display results on the complete geometry by mirroring or repeating the domain. For example, only one half of the annulus shown in Figure 28.4.7 was modeled, but the graphics are displayed on both halves. You can also define mirror planes or periodic repeats just for graphical display, even if you did not model your problem using symmetry or periodic boundaries.
Display of symmetry and periodic repeats is controlled in the Views panel (Figure 28.4.8).
For a symmetric domain, all symmetry boundaries are listed in the Mirror Planes list. Select one or more of these boundaries as the plane(s) about which to mirror the display.
For a periodic domain, click the Define... button to open the Graphics Periodicity panel, to access the periodicity parameters. Specify the number of times to repeat the modeled portion by increasing the value of Number of Repeats. If, for example, you modeled a 90 sector of a duct and you wanted to display results on the entire duct, you would set Number of Repeats to 4.
In some cases, there may be multiple zones with different periodicity in the domain. For example, in turbomachinery problems with multiple blade rows using the mixing plane model, the periodic angles are different for each blade row. One blade may contain 20 blades (18 periodic angle) and other may contain 15 blades (24 periodic angle). In such cases select the required cell zone and specify the number of repeats for that particular cell zone.
When you click Set in the Graphics Periodicity panel the graphics display will be immediately updated to show the requested periodic repeats.
Figures 28.4.9 and 28.4.10 shows the display for the sample geometry before and after applying the periodic repeats respectively. In this case the value of Number of Repeats is set to 6 for the 60 sector (outer part) and to a value of 4 is set for the 90 sector (inner part) of the geometry.
Periodic Repeats for Graphics
To define graphical periodicity for a non-periodic domain, follow these steps:
You can delete the definition of any periodicity you have defined for graphics by clicking on the Reset button in the Graphics Periodicity panel.
Mirroring for Graphics
To define a mirror plane for a non-symmetric domain, follow the procedure below:
If you want to delete a mirror plane that you have defined, select it in the Mirror Planes list in the Mirror Planes panel and click the Delete button. When you click OK in this panel, the deleted plane will be removed permanently from the Mirror Planes list in the Views panel.