[EMolina]

Hi Su2 users and developers.

I am having problems in setting periodic boundary conditions. I am trying to simulate 3D circular cylinder using URANS and DES (please see the other topic of Hybrid RANS/LES) with periodic boundary conditions in the spanwise direction.

I started with a 2D mesh and extrude this grid inside ICEM-CFD, so the nodes perfectly match in spanwise and export it in CGNS format. When I configure this 2 BC in spanwise using symmetry BC the code runs smoothly, but when I configure with periodic BC I have some non-physical points and the code diverges.

I tried to run SU2_PBC first, making the following change on cfg file:
MARKER_PERIODIC= ( SYM1, SYM2, 0.0, 0.0, 2.0, 0.0, 0.0, 0.0, 0.0, 0.0, 4.0, SYM2, SYM1, 0.0, 0.0, 2.0, 0.0, 0.0, 0.0, 0.0, 0.0, -4.0 )
%MARKER_SYM= (SYM1, SYM2)
%

The console output is:
-------------------- Setting the periodic boundaries --------------------
Setting the periodic boundary conditions.
Checking SYM2 boundary against periodic donor, SYM1.
Checking SYM1 boundary against periodic donor, SYM2.
Number of new points: 30584.
Number of new interior elements: 30252.
Number of new boundary elements added to preexisting markers: 664.
Segmentation fault
--------------------------------------------------------------------------------------

Note that SYM1 BC is located at Z=0.0 and SYM2 BC is located at Z=4.0.

SU2 can run with unsteady periodic BC or I am doing something wrong?
I appreciate any tips/help from the community, I also can attach a link to the 3D mesh and cfg file.

Regards.

Eduardo