meshing a fluid/solid what's the best format to import the geometry
 

Hi
I've got a geometry composed a solid and 2 fluids.
I'm experiencing with different size geometries and once in a while I would have problems generating a (conformal?) mesh - well it does generate but can't be exported to fluent.

So far the best technique has been to export my SolidWorks assembly (3 parts) into a STEP file which I import in workbench.

DesignModeler imports 3 bodies.

It doesn't work all on the time though.

What are you guys doing to prevent issues with improper mesh?

Thanks
Steve

Hey
What is your problem exactly? CAD format for import to ANSYS? If you use solidworks, you can import directly with sldprt format to ansys

Thanks for the response, Amin

I know I can import many different format including native SW files.

I noticed that depending on the file format that I am using, the interface surfaces will sometimes cause overlapping issues when exporting the mesh through workbench. And I also noticed that sometimes Fluent would identify interfaces, creating mating shadow zones, sometimes it won't.

I have had the best results importing STEP files and creating a multibody part from the bodies in DesignModeler.

However it still doesn't always work so I am wondering what you guys are doing when working with multiple 3D solid/fluids.


Thanks
Steve

I've experienced the same problem
I suggest you:
1. Import your CAD as sldprt format! sometimes STEP/STP format gives small changes in model dimensions and cause overlapping and...
2. If it's possible, use boolean for ensure that interfaces and... be OK!
3. sometimes fluent doesn't know mesh interfaces! so you should use connection in ansys meshing for model interfaces!