[Vino]

Hi,

I am simulating a shock instability case using SU2 in a square domain with unit length(shown below). I need to apply periodic boundary condition in top and bottom side. First I preprocessed with SU2_MSH and then I used the mesh_out.su2 file for simulation. I used the following in the config file.


MARKER_PERIODIC= ( top, bottom, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,bottom, top, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0)


I am not getting the expected results and I am not sure whether the BC specification is correct. Please clarify.

Thanks in advance.

[economon]

Hi Vino,

For the periodic BC with the latest version of the code, you only need to provide the first half of your specification, i.e.,

MARKER_PERIODIC= ( top, bottom, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 )

Additionally, you need to provide the translational distance between the top and bottom instead of all zeros. If it was 1 m in the y-dir, for example, you would put

MARKER_PERIODIC= ( top, bottom, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, -1.0, 0.0 )

We also have an example of this for the VKI turbine in our test cases that are available. You can check out the config there for another example (see TestCases/rans/vki_turbine/).

Hope this helps,

Tom

[Vino]

Thank you very much economon.

This is what exactly I was looking for. Let me try now.