Federico Alzamora Previtali
Ansys Employee

Hello, 

First use Share only, as Force Share may sometimes be too aggressive. SpaceClaim will let you know if some contacts could not be created within the specified tolerance.

If you suspect your model to have small gaps or intersections, see if you can repair them within SpaceClaim. SpaceClaim as built-in tools to highlight some of these issues to help you with the repairs. For example, the Interference tool in the Prepare tab may find those intersections for you.

 

If Share Topology is done correctly in SpaceClaim, Fluent Meshing should suggest No for Apply Share Topology. If you see Yes, this suggests that some contacts were not shared correctly.