You can solve only the simple rotation of a moving part around a fixed axis.

It does not allow the intermeshing of moving parts.

In this technique, surround each moving part by a cylinder. These cylinders should neither overlap nor cross boundaries of the flow domain during simulation. In 2D cases, the moving parts must be surrounded by circles.

It is available for Generalized Newtonian fluids (isothermal or nonisothermal) and heat conduction problems. It is not available for viscoelastic fluids and transport of species.

Sliding mesh motion is limited to rigid rotation. You can define an angular velocity varying with time, if required. Note that Ansys Polydata will not check if the angular velocity of the sliding mesh is compatible with the boundary condition imposed along the internal boundary of sliding mesh.

The mixing task is not compatible with the flow fields obtained with sliding mesh techniques. As the node positions of the sliding mesh change with time, the mesh of the flow domain becomes variable. This is a major limitation of the algorithm implemented to track particle paths in Ansys Polyflow.

While the residence time distribution is calculated for most flow problems, this option is not available when sliding meshes are defined.