Fluent Meshing Fail to Associate mesh with imported geometry

[Dato]

Hi all,

I have imported a .scdoc file into Fluent Meshing using WTM workflow. There is only one body created in the .scdoc file.It is a heat transfer device with helical pipes. During the mesh generation, it failed in creating the surface mesh with Self-intersections warning.

The message in TUI shows : 

---- Warning--- Failed Share Topology in DM/SCDM, Attempting to repair model ....

 

Error: The model contains self-intersections which could not be automatically repaired

Error Object: #f

 

I have checked out the self-intersection location. The self-intersections location figures of two perspectives are exactly shown below. The shape comparison between the origin geometry object and mesh object are shown. It can be seen that there is a large deviation between origin geometry and the mesh object. This is the only problem with the generated surface mesh and it cannot be fixed with Join/Intersect tool. It's inexplicable that there is no geometry problem like self-intersection problem but it exists in the surface mesh.  

 

It's first time for me to encounter the surface mesh issue with WTM workflow. I tried restart FM and remesh it with other mesh size field, but self-intersection region still exist. It really puzzles me that I cannot find out other possible solutions.

Are there any suggestionsd? Any advice is highly appreciated.