Define Streamwise Periodic Conditions

Use the Periodic: Streamwise tool to define periodic boundaries with translational periodicity and an offset in variables. Streamwise periodic boundary conditions specify that the values of the second surface set are equal to those of the first surface set plus a constant value or a ratio.

1. From the Flow ribbon, click the Periodic > Streamwise tool.

   
   
   Figure 1.

2. Select source surfaces.
   If target surfaces are already selected, updating the source selection will reset the existing target selection.
3. Click the Target selector on the guide bar.
4. Select target surfaces.
   You will only be able to select surfaces which can form translational periodicity with the source selection.

   If any of the source surfaces do not have a compatible target surface, the tool will not allow you to select any target surfaces.

5. In the dialog, specify pressure offset and mass flow rate.
6. Optional: Click the Advanced tab and specify precedence, active type, and linked surface outputs
   The active type determines if the periodicity definition is considered or not.
7. From the guide bar, execute the command in the following ways:
   • Click to confirm your selection and remain in the tool.

     This allows you to continue creating instances and helps you visualize and edit instances with the legend.

   • Click to confirm your selection and exit the tool.