Learning Forum

[Jacopo Boscariol]

Hi everyone, i am a new user of Ansys Fluent Meshing and i am trying to mesh the geometry of a rocket. I have different named selections for which i want to use the Add Local Sizing tool. Everything seems to work fine until for a certain named selection i use Proximity and Scope To: faces and edges, as i get a red warning message: ---- Warning--- Note that size controls based on edges cannot be used in a Size Control File. In particular, i have noticed that this warning appears everytime i use Scope To: edges/faces and edges, so basically everytime edges are involved. When i complete the Add Local Sizing process and i try to generate the surface mesh i get this error:

Error: Scoped sizing controls for (boat_edges), does not evaluate to valid zone(s).

Error Object: #f

in which boat is one of the named selections in which i selected Scope To: edges/faces and edges. Eventually the mesh does not generate. I hope someone can help me, thank you.

[Rob]

Can you post an image of the geometry and highlight where the edges are? Also, can you confirm https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v231/en/flu_ug/tgd_user_workflow_guided_tasks_local_sizing.html has been followed, Number 3, first bullet. 

[Jacopo Boscariol]

Hi, thank you for answering. Yes i am pretty sure i followed correctly the steps in the link, i am attaching the image of the geometry and of the named selections:

in red I highlighted the fins (name selection: fins) in which I later use Proximity, Scope To: edges while in blue I highlighted the boat-tail (name selection: boat) for which I use Proximity, Scope To: faces and edges.

Here is an image of the bullet enclosure and the named selections:

tell me if you need anything else.

[Rob]

Not sure, if the tip of the fin is a single edge proximity won't do much though.