*7.1.4 Need for interfaces*

Since we have used a 1/3rd geometry setup, we need to declare the adjoining faces as interfaces. This setup will cause **Fluent** to assume that the geometry repeats. The settings include the periodic angle setup, which will be set at 120 degrees.

### **7.2 Results**

This is the final step post solution iterations. When the errors have fallen below the tolerance value, the simulation is stopped. Finally, the results can be seen in CFD-Post.
