Defining the Fluid Regions

To define the air domain and its motion, you require four additional regions—two regions for the rotating air domain (one for the air gap and one for the air surrounding the rotor) and two regions for the stationary air domain (one for the air gap and one for the air surrounding the stator).

  1. Create the remaining regions:
    1. Expand the Geometry > Parts > Rotor Parts and Stator Parts nodes and multi-select the following parts:
      • Rotor Air Box
      • Rotor Air Gap
      • Stator Air Box
      • Stator Air Gap
    2. Right-click one of the selected nodes and select Assign Parts to Regions.
    3. In the Assign Parts to Regions dialog, select the following options and click Apply then Close:
      • Create a Region for Each Part
      • Do Not Create Interfaces From Contacts
    4. Expand the Regions node and rename the following nodes:
      Current Name New Name
      Rotor Parts. Rotor Air Box Rotor Air Box
      Rotor Parts. Rotor Air Gap Rotor Air Gap
      Stator Parts. Stator Air Box Stator Air Box
      Stator Parts. Stator Air Gap Stator Air Gap
  2. Define the boundaries for the Stator Air Box:
    1. Right-click Stator Air Box > Boundaries and select New.
    2. Rename Boundary 1 to Symmetry.
    3. Select the Symmetry node and set the following properties:
      Property Value
      Part Surface Name Contains Symmetry (You can define this property by selecting the (Query Editor)
      Type Symmetry Plane
    4. Select the Boundaries > Stator Air Box node and set Part Surfaces to Name does not Contains Symmetry.
Define the remaining regions:
  1. Select the Regions > Stator Air Box > Physics Values > Axis node and set Direction to [1.0, 0.0, 0.0].
  2. Repeat the previous step for Regions > Stator Air Gap > Physics Values > Axis.
  3. Multi-select the Regions > Rotor Air Box > Physics Values > Motion Specification and Regions > Rotor Air Gap > Physics Values > Motion Specification, and set Motion to Rotation.
  4. Right-click the Regions node and select Group By > Physics Values > Motion Specification.