How Can I mesh non-watertight geometries?

I am familiar with the watertight geometry workflow in fluent meshing, but there is another workflow for when the CAD is dirty (lots of overlaps and intersecting parts ) which is my case. Do you have any materials on that workflow?

The workflow you mention is called "Ansys Fluent Meshing with Fault-Tolerant Meshing (FTM) Workflow." These are some resources you can use to learn more about it:

ANSYS LEARNING HUB (Paid): https://jam8.sapjam.com/groups/cMRz3zgpbywe5foFBYreSV/overview_page/bmMl1VamrTLLCeMPo8sYSF
Fluent tutorial (Paid): https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v221/en/flu_tg/flu_tg_exhaust_system.html
Youtube video (Free): https://youtu.be/-MbRfhVWnVk

Fluent's Task-Based Fault-Tolerant Workflow Speeds Meshing Dirty Geometry

ANSYS Fluent includes a task-based, fault-tolerant workflow that simplifies and speeds meshing for non-watertight, dirty geometries. Watch how the mesh wrapp...

youtu.be

Best regards,