This could be related to geometry or this could be related to sizing.
Please check your geometry if you have any edges connected to only one face.
Also check sizing. Giving correct sizing is key to successful meshing.
https://ansyshelp.ansys.com/account/secured?returnurl=/Views/Secured/corp/v221/en/flu_ug/tgd_user_workflow_guided_tasks_setup_mesh_controls.html?q=curvature%20sizing
Please go through help manual for more details
Regards,
Keyur
How to access Ansys Online Help Document
Guidelines on the Student Community
Fluids Engineering Courses | Ansys Innovation Courses
You are navigating away from the AIS Discovery experience