[-roberto]

Hi, I'm studying with ANSYS Fluent a particular geometry which consists in an horizontal pipe with a spiral pipe rolling around the horizontal one (you can see the geometry in the .jpeg attached).

I created it in Solid Works and then imported in ANSYS. In solid works I created separately different bodies and then I repeated them in order to create the entire geometry, after importing the file in ANSYS, the first thing I am trying to do is to unite all these different bodies.

I select all the bodies of the spiral tube, I unfreeze them and then when I press "generate" an error occurs saying "Error: Operation would result in non-manifold bodies".

It seems to me very strange because if I unfreeze all the bodies exept the last two on the righr it works, so the problem is (I think) in these two last bodies.

I'm not very expert in ANSYS-Fluent, I've started to use it few weeks ago, so maybe I am forgetting something to do.

Please can you help me? Thanks

PS:FILE ATTACHED:

-unfreeze_1 shows the geometry (horizontal pipe, spiral external pipe-the one I try to unfreeze, the internal spiral which is the fluid)
- unfreeze_2 shows the unfreeze error
- unfreeze_3 shows that, if I try to unfreeze only the 3 spirals withouth the two endings the unfreeze command is working
- unfreeze_4 shows that if I unfreeze the three spirals and the left-ending it is working

I've uploaded the geometry file FFF.zip here http://dropmefiles.com/9nGYF if you want to download it and try to solve the problem!