Gap produced in sliding mesh
 

I'm simulating in Fluent a 2D case of a sliding mesh.

It seems to move alright until it reaches the end and sweeps to the previous point. Then, instead of being placed at the same location, a little gap between both interfaces is generated, so Fluent crashes. http://www.cfd-online.com/Forums/mem...e562-mesh1.jpghttp://www.cfd-online.com/Forums/mem...e564-mesh3.jpghttp://www.cfd-online.com/Forums/mem...e565-mesh4.jpghttp://www.cfd-online.com/Forums/mem...e563-mesh2.jpg

The size of the gap is the same one, independently of the initial location of the sliding mesh.

I have attached four images of the case; "mesh1" and "mesh2" represent the motion of the mesh prior to sweep. "mesh3" and "mesh4" are the mesh after sweeping, where the little gap can be seen (the last one is a zoom of it).

I have no idea why this happens, so I would really appreciate if any of you could give me any possible clue.

Thanks in advanced.
http://www.cfd-online.com/Forums/[IM...e564-mesh3.jpg[/IMG]
http://www.cfd-online.com/Forums/[IM...e562-mesh1.jpg[/IMG]http://www.cfd-online.com/Forums/[IM...e563-mesh2.jpg[/IMG]http://www.cfd-online.com/Forums/[IM...e565-mesh4.jpg[/IMG]