[exm5360]

Hello, I'm currently working on a pump design and I'm running into an issue with two stationary domains (which I can best describe as two 90 degree bends) that are connected to one another. I run the case and the following error pops up.

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Both sides of GGI rotationally periodic boundary condition "Chann- |
| el Bend 1 to Channel Bend 2" have the same axial or radial positi- |
| on. Possible solutions include: (a) check that the condition is s- |
| pecified properly; (b) check that the rotation axis for the perio- |
| dic condition is set properly; (c) decrease the value of the expe- |
| rt parameter "ggi periodic axial radial -ErrMsg buffer overflow- |
+--------------------------------------------------------------------+

+--------------------------------------------------------------------+
| ERROR #001100279 has occurred in subroutine ErrAction. |
| Message: |
| Stopped in routine SRF_CORRECT_44 |
| |
| |
| |
| |
| |
+--------------------------------------------------------------------+

Here are some of my setup parameters for this Channel 1 to Channel 2

-The outlet of channel 1 is interfaced to the inlet of channel 2 with a rotational periodicity.

[ghorrocks]

The error message seems to be quite clear - you have set your GGI to be rotationally periodic but the two faces are on top of each other. It sounds like you just want a normal (not periodic) GGI interface to simply connect two mesh regions.

[Jiricbeng]

Hello,

I have the same problem. However, it looks like some weird tolerance issue. I have the periodic surfaces selected well, it is not the problem of course. But I found that if I increase the domain axially, then this error disappears and it works. But when I decrease the axial distance of my domain to about 0.1mm, I this error is back. I use Ansys meshing, I tried .cmdb and .cngs meshes, change tolerances in mesh import, but nothing works.

By the way, the error says to decrease the expert parameter ""ggi periodic axial radial", but I cannot see it anyway.

Another interesting point is that when I used similar geometry coming from turbogrid (as .gtm) to the same CFX, it worked... this lead me to focusing on some tolerances.

I will be glad for any advice.

[ghorrocks]

If it is just a tolerancing issue like you suggest then add the expert parameter to change the tolerance. You can add expert parameters through CFX-Pre, or directly into CCL. Note that CFX-Pre does not have all the expert parameters available, some of them are only available through CCL. So this one might be a CCL only one.

[Jiricbeng]

Super, it works. I added the expert parameter via command editor.

Thank you!