[omdemircan]

I am trying to get solution output from an unsteady simulation that I have run using the mpirun command. In steady cases I can use SU2_SOL with the config file and get the flow.vtk file but the same process doesn't seem to work for the unsteady case. I am getting a segmentation fault error and no file is created.
Additionally, I realized that the python script "parallel_computation.py" isn't working. I think I may have installed the code incorrectly but I would really appreciate it if anyone could help me on this matter.

Here is the error I am getting from SU2_SOL:
------------------------- Solution Postprocessing -----------------------
[omdemircan:09268] *** Process received signal ***
[omdemircan:09268] Signal: Segmentation fault (11)
[omdemircan:09268] Signal code: Address not mapped (1)
[omdemircan:09268] Failing at address: (nil)
[omdemircan:09268] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x11630)[0x7fb7df0a7630]
[omdemircan:09268] [ 1] SU2_SOL(+0x2e9bc)[0x561308ab19bc]
[omdemircan:09268] [ 2] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf1)[0x7fb7decef3f1]
[omdemircan:09268] [ 3] SU2_SOL(+0xeb63a)[0x561308b6e63a]
[omdemircan:09268] *** End of error message ***
Segmentation fault (core dumped)

and the error when I try to sun parallel_computation.py:
Traceback (most recent call last):
File "/usr/local/bin/parallel_computation.py", line 112, in <module>
main()
File "/usr/local/bin/parallel_computation.py", line 63, in main
options.compute )
File "/usr/local/bin/parallel_computation.py", line 90, in parallel_computation
info = SU2.run.CFD(config)
File "/usr/local/bin/SU2/run/interface.py", line 89, in CFD
auto_diff = konfig.MATH_PROBLEM == 'DISCRETE_ADJOINT'
File "/usr/local/bin/SU2/io/config.py", line 130, in __getattr__
raise AttributeError , 'Config parameter not found'
AttributeError: Config parameter not found

[messimagic]

did you remember to type .cfg after the config file name?

Like so:

python parallel_computation.py -f inv_ONERAM6.cfg -n 1

[omdemircan]

It's been some time but I remember the error was gone after I reinstalled SU2, I guess something went wrong during the installation.

[fpalacios]

Hi, thanks a lot for using SU2!

Not 100% sure but... unfortunately, I think that the unsteady SU2 output was never implemented for unsteady problems. In fact, the Paraview output doesn't have the maintenance that we would like (there is no a binary version!).

Have you tried TecPlot output? I think it is possible to have a free license for 1 month..

Anyway, could you please add this problem to the list of issues

https://github.com/su2code/SU2/issues

And, if you are interested in working on the Paraview output, you are more than welcome!

Thanks

Francisco

[omdemircan]

Hi,
The source of the segmentation error that I mentioned in this thread was a bad configuration during the intallation. I resolved this issue by reinstalling SU2 and the script ran without giving any errors.
However, getting the Paraview output from the solution data with the SU2_SOL command doesn't seem to be working as it seems to be written only for steady simulations. For solving this problem, I have found a work-around that gives me the Paraview output for each solution data that the code outputs. I have written a very simple python script and shared it in the following thread: parallel_computation.py not working
I don't know if I am doing something wrong when calling SU2_SOL or is it actually as you said, that SU2 unsteady output was never implemented to the code.
Secondly, I didn't quite understand what you meant by trying Tecplot and I haven't used it with SU2 before. The output from the python script that I have written can be opened with Paraview like an unsteady case. I even used it to get pressure data at a point with respect to time/iteration. The problem here is that the solution files tend to be very big since they store all information about the unsteady case. So I think the user should be able to specify different intervals for saving flow data and the surface data.

[fpalacios]

Thanks for the clarification.
We would appreciate if you add this issue to

https://github.com/su2code/SU2/issues

including your python script

It is the best way to capture the attention of the unsteady solver developers. I know most of them use TecPlot http://www.tecplot.com which is an excellent post-processing tool... but, proprietary.

Thanks!
Francisco

[omdemircan]

I checked the link you provided and searched for a similar issue, it seems someone else pointed the same issue here: https://github.com/su2code/SU2/issues/133. I added my thoughts as you requested.

Thank you.
Osman Mirza Demircan