[Henry Arrigo]

I generated hexa mesh for a wing but I could not get any result in CFX. It seems that the mesh is ok but it doesn t work. The error is:


+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Floating point exception: Overflow |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------+

Parallel run: Received message from slave
-----------------------------------------
Slave partition : 3
Slave routine : ErrAction
Master location : RCVBUF,MSGTAG=1032
Message label : 001100279
Message follows below - :

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Stopped in routine FPX: C_FPX_HANDLER |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| An error has occurred in cfx5solve: |
| |
| The ANSYS CFX solver exited with return code 123. No results |
| file has been created. |
+--------------------------------------------------------------------+

[Kina]

From my experience, fluent gives over or underflow errors when the cells near your object are in some kind bad or broken. Can have to do with left handed cells or negative volume elements that are built at the surface because of a too coarse resolution or other causes. Did you perform a mesh check in icem? That should probably give you an error message because of wrong surface orientations.

[Henry Arrigo]

Thanks for you reply Alex,
No I didn t. How can I do that?

[Kina]

I don't have ICEM open right now, but you should find it in the "edit mesh" tab. I think it's the third icon from the left. A green hexamesh with a red checkmark on it. That should tell you what's wrong with your mesh and from there you can check what action you should take to avoid that problem.

[Henry Arrigo]

So I have to first convert it to unstructured, right? Is there any tool by which I can do pre-mesh check?

[ghost82]

Hi Henry,
I don't know cfx, but you can export your mesh as msh and import it into fluent; then click on the check button to see if there are errors.

Daniele

EDIT: searching the forum I think it's not related to the mesh: check this link:
http://www.cfd-online.com/Wiki/Ansys...do_about_it.3F

As a first try I would turn on double precision and reduce the time step.

[Henry Arrigo]

Alex, here is the results of check:
(if this check is enough then looks like everything is OK)

Running diagnostics for Duplicate elements in subset "all"
No problems were found for Duplicate elements
Running diagnostics for Uncovered faces in subset "all"
No problem volume elements were found for Uncovered faces
Running diagnostics for Missing internal faces in subset "all"
No problems were found for Missing internal faces
Running diagnostics for Volume orientations in subset "all"
No problems were found for Volume orientations
Running diagnostics for Surface orientations in subset "all"
faces are correctly oriented
Surface orientations are OK
Running diagnostics for Hanging elements in subset "all"
No problems were found for Hanging elements
Running diagnostics for Multiple edges in subset "all"
No problems were found for Multiple edges
Running diagnostics for Triangle boxes in subset "all"
No problems were found for Triangle boxes
Running diagnostics for Single edges in subset "all"
No problems were found for Single edges
Running diagnostics for Non-manifold vertices in subset "all"
No problems were found for Non-manifold vertices
Running diagnostics for Overlapping elements in subset "all"
No problems were found for Overlapping elements
Running diagnostics for Unconnected vertices in subset "all"
0 unconnected vertices were found.
Unconnected vertices are OK
-----------------------------------
and thanks for your suggestion ghost but I dont have access to FLUENT right now

[Henry Arrigo]

anybody has any Idea?