Setting the 'sliding velocity' of object surfaces

Case 249, one of the earliest entries in the PHOENICS Input-File library, exemplifies a sliding-surface boundary condition, This is achieved by specifying that, at a certain 'patch', the fluid is in contact with a moving wall at the top of the following picture.
By means of the VR-Editor, it is possible to introduce the same effect at the surface of a solid object by means which can be learned by clicking here.

The sliding velocity can be set for blockages as well as for plates. By setting the surface velocity, a range of cases involving steady movement can be treated as steady-state.

In Cartesian co-ordinates, there is a 'Spin' option which sets the surface velocity as if the object were rotating about its axis.

In polar co-ordinates, the slide velocity can be in m/s or rad/s. The following image shows a bar being pulled at constant speed through a polar-co-ordinate domain: