CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   ANSYS Meshing & Geometry (http://www.cfd-online.com/Forums/ansys-meshing/)
-   -   [ICEM] Periodic condition between ICEM and FLUENT (http://www.cfd-online.com/Forums/ansys-meshing/105652-periodic-condition-between-icem-fluent.html)

Touré August 5, 2012 17:00

Periodic condition between ICEM and FLUENT
 
5 Attachment(s)
Hi,
I need some help on periodic condition and quick. Pleasssssssssssssssssssssssssssse.
This is the first time I use periodic condition with ICEM.
I have 44 rotational periodic zones of a stator or rotor.
The periodical surfaces are shown on the last picture. They are not planar as you can see. Is it the problem with FLUENT?
I selected "Rotational periodic" in Mesh -> Global Mesh setup -> Set up periodicity as shown in the first figure.
I checked the mesh in Edit Mesh -> check Mesh as shown in in the second and third figures and I get the message with ICEM:

……………………………………..
……………………………………..
……………………………………..

Running diagnostics for Periodic problems in subset "all"
shell 173314 has node 10707 which has no twin
shell 173651 has node 31817 which has no twin

……………………………………..
……………………………………..
……………………………………..

Remeshing 86 elements to fix problematic regions
"Custom quality" diagnostic function is not activated.
1 element pair swapped
Periodicity of 89 element vertices will be ignored.
Connectivity to attached volume elements will be ignored.
40 elements replaced by 33.
31 elements replaced by 21.
...done.
Running diagnostics for Unconnected vertices in subset "all"
0 unconnected vertices were found.
Unconnected vertices are OK





I ignored the bad periodic in the fourth figure.

I wanted to make periodic the boundaries stator-per1 and stator-per2 which are in the list-zones below with FLUENT because I cannot load the mesh file if I define them perodic with ICEM.

I get this message with FLUENT:


> mesh/modify-zones

/mesh/modify-zones> list-zones
id name type material kind
---- ------------------------- ------------------ -------------------- ----
12 fluid-stator fluid air cell
13 int_fluid-stator interior face
14 velocity-inlet-stator velocity-inlet face
15 pressure-outlet-stator pressure-outlet face
16 stator-hub wall aluminum face
17 stator-shroud wall aluminum face
18 stator-blade wall aluminum face
19 stator-per1 wall aluminum face
20 stator-per2 wall aluminum face

/mesh/modify-zones> make-periodic
Periodic zone [()] 19
Shadow zone [()] 20
Rotational periodic? (if no, translational) [yes] yes
Create periodic zones? [yes] yes

Warning: differing number of faces on these threads.
zone 19: matched 0 out of 2696 faces.
zone 20: matched 0 out of 2972 faces.

Error: Failed to make zones periodic.
Error Object: #f

/mesh/modify-zones>


All times are GMT -4. The time now is 05:33.