If inertia is considered, Ansys Polyflow automatically adds a corrective term to the momentum and energy equations considering the rigid motion of sliding meshes. The equations solved on the surrounding domain are not modified.

Thus, for the sliding mesh part of the computation, the momentum Equation 10–1 becomes:

(23–1)

while the energy Equation 13–15 becomes:

(23–2)

where is the rigid velocity field corresponding to the rigid rotation of a sliding mesh.