Defining Direct Rotating Motion

For a prescribed rotation, you have the option to add rotations independently to different parts of a region. If there are more parts assigned to the region, you can subgroup the parts, define a rotation for each subgroup. This functionality is beneficial for multiple parts with the same physics but different rotational values. One example is a templated full vehicle simulation including four wheels with different rotational speed.

To define a direct rotation for a region, select the Regions > [region] > Physics Conditions > Motion Specification Option and set the Option to Direct Rotating Motion Values.
The corresponding nodes appear under Physics Values:
Select the Physics Values > Direct Rotating Motion > Direct Rotating Motion Values node and set the properties to specify the rotation.
To activate the Part Subgroup of the rotation:
1. Select the Regions > [Region] node and activate Allow Per-Part Values.
  A node Part Subgroupings appears in the simulation tree with a predefined Subgrouping 1—A collection of subgroups and a predefined Subgroup 1. See also: Applying Quantities by Subgroup.
2. To add additional subgroups, right-click the Part Subgroupings > Subgrouping 1 node and select New.
3. Select the Subgrouping 1 > [subgroup] node and group the parts with the same rotation values in Objects.
4. To specify a rotation for each subgroup, select the Physics Values > Direct Rotating Motion node and activate Specify by Part Subgroup.
  The existing subgroups are added automatically to the Direct Rotating Motion > By Parts Subgroup node.
5. Select the Direct Rotating Motion > By Parts Subgroup > [subgroup] > Direct Rotating Motion Values and set the properties to specify the rotation of this subgroup.

The Direct Rotating Motion is currently incompatible with:


Model	Boundary	Interface		Region
Adjoint Aeroacoustic Solid Stress Solid Energy Harmonic Balance Flow Viscous Flow Viscous Multiphase Lagrangian Multiphase	Pressure Outlet with Non-Reflecting Option See Non-Reflecting Option. Stagnation Inlet with Non-Reflecting Option Baffle Blower Inlet Blower Outlet Fluid Film Mixing Plane Inlet Mixing Plane Outlet Porous Baffle Thermal Network	Interface Type	Interface Topology	Particle Region Shell Region
		Baffle Blower Fluid Film Mixing Plane Porous Baffle Thermal Network For more details, refer to .	Repeating For more details, refer to Repeating Interface Topology.	Particle Region Shell Region