[darazsbence]

Hi everyone!

My problem is quite simple but i'm new to Icem so i have difficulties only. Anyway, i created a 2d mesh in Icem and i want to use it Cfx but i cannot manage to output it.

I always get an error messege that says: "no volume elements found.child process exited abnormally".

I tried to extrude the mesh by one layer only as my simulation would be 2D but i got the same error again.

Thanks in advance

[mjgraf]

CFX requires 3 elements thick i believe

search the forum there is a description and I also think a tip about export to fluent, importing that into Pre and it does it automatically?????

Originally Posted by darazsbence

Hi everyone!

My problem is quite simple but i'm new to Icem so i have difficulties only. Anyway, i created a 2d mesh in Icem and i want to use it Cfx but i cannot manage to output it.

I always get an error messege that says: "no volume elements found.child process exited abnormally".

I tried to extrude the mesh by one layer only as my simulation would be 2D but i got the same error again.

Thanks in advance

[flotus1]

Ansys CFX has no 2D Solver. Fluent on the other hand does...
CFX requires a volume mesh with at least ONE cell in the direction of symmetry. ICEM can extrude your 2D mesh to 3D.

[darazsbence]

First, thank you guys for the quick answers, i really do appreciate them.

Unfortunatly, i have to use cfx for solving my assignement, fluent is not good for me. The other thing: how to create a 3d mesh from a 2d mesh? I created a 2d geometry then the blocks and the mesh, all this in 2d. After this, a selected extrude mesh and extruded it. I thought this would result in a volume mesh but as it apperas it wouldn't. Please help me out. Thank you again.

[jrunsten]

You can export a 2d mesh to fluent format (msh). When imported to cfx it will automatically extrude it one element for you

[Far]

Export as .msh (Fluent mesh) and import into CFX-Pre. You will get the mesh one element extruded by CFX for you.

Or you can extrude mesh in edit mesh tab. Convert pre-mesh to unstructured mesh and use edit mesh tab.

[darazsbence]

I got it working, thanks everyone.

Another problem came up: when i imported the cfx5 file into cfx-pre and i tried to determine boundary conditions i cannot select any of the surfaces, i only have one thing to choose, it's called: Primitive 2d. Is it possible that in icem i somehow create surfaces that actually appear in cfx-pre and i can select them as inlet, outlet, wall etc. ?

Huge thanks to every one of you.

[Far]

You should be able to select the boundaries in CFX-Pre. I guess it is not possible to export boundary conditions from ICEM to CFX.

[darazsbence]

When i create the cfx5 file i got this messege in the log:
"WARNING : family SOLID has mixed of 2D and 3D elements, this is not allowed in CFX-5.". Do you have any idea what problem can it cause and how can i help it? Thank you.

[Far]

re-name solid to Fluid and try...

[darazsbence]

Doesn't work.

I also tried something else:
I started cfx from workbench and created the geometry in mechanical. After that i started meshing and inserted mesh method then selected uniform quad, and switched write icem cfd file to interactive. After all of this i created the mesh in icem and converted pre-mesh to unstructured mesh at the end. Even so when i close icem, in workbench meshing i'm stuck with the old mesh. How can i preserve the mesh i created in icem?

I really don't know what to do.

Thank you.

[flotus1]

Originally Posted by darazsbence

When i create the cfx5 file i got this messege in the log:
"WARNING : family SOLID has mixed of 2D and 3D elements, this is not allowed in CFX-5.". Do you have any idea what problem can it cause and how can i help it? Thank you.

Sounds like you need to delete the remaining 2D mesh...