Defining the Wing Motion

To account for the wing total displacements, you superpose three motions that move the solid mesh according to the prescribed sweeping motion, the prescribed pitching motion, and the deformation calculated by the stress solver.

To create the sweeping motion:

  1. Right-click the Tools > Motions node and select New > Rotation.
  2. Rename the Motions > Rotation node to Wing Sweeping.
Specify the coordinate system for the sweeping motion. The initial simulation contains predefined coordinate systems that define the initial orientation before the motion starts:
  1. Select the Motions > Wing Sweeping node and set Coordinate System to Laboratory > Stroke Plane.
    You define the remaining properties of the sweeping motion in the next section.
Superpose the pitching motion on the sweeping motion:
  1. Right-click the Motions > Wing Sweeping > Superposing Motions node and select New > Rotation.
  2. Rename the Rotation node to Wing Pitching.
    When you create the pitching motion, Simcenter STAR-CCM+ automatically creates the coordinate system in which the motion is defined, Wing Pitching-CSys:

    The coordinate system for the pitching motion moves according to the parent sweeping motion. To reflect this, Simcenter STAR-CCM+ automatically sets the following properties:
    Motion Node Property Setting
    Wing Sweeping Managed Coordinate Systems Laboratory > Stroke Plane > Wing Pitching-CSys
    Wing Pitching Coordinate Systems Laboratory > Stroke Plane > Wing Pitching-CSys

    You define the remaining properties of the pitching motion in the next section.

Modify the properties of the Wing Pitching-CSys coordinate system so that it is oriented according to the initial stroke angle. As a shortcut, you can copy and paste the properties of the Stroke_Fixed_InitialConfiguration node onto the Wing Pitching-CSys node.
  1. Expand the Tools > Coordinate Systems > Laboratory > Local Coordinate Systems > Stroke Plane > Local Coordinate Systems node.
  2. Right-click the Stroke_Fixed_InitialConfiguration node and select Copy.
  3. Right-click the Stroke Plane > Local Coordinate Systems > Wing Pitching-CSys node and select Paste.
Finally, superpose the Solid Displacement motion, which accounts for the displacements calculated by the solid stress solver:
  1. Right-click the Wing Pitching > Superposing Motions node and select New > Solid Displacement.


To assign the superposed motions to the wing region:
  1. Select the Regions > Wing > Physics Values > Motion Specification node and set Motion to Wing Sweeping > Wing Pitching > Solid Displacement.
  2. Save the simulation.
The next two sections provide instructions for specifying the details of the imposed rigid motions (sweeping and pitching). The Solid Displacement motion does not require any other settings, as the non-rigid displacements are provided by the solid stress solver.