code_saturne User's Forum

Hello,

In most of our verification cases, we obtain 2nd order convergence, so your results are a bit surprising.

Did you test using the default centered scheme ? SOLU is somewhat more robust, not more precise.

Also, what type of mesh are you using ?

Regards,

Yvan

Hello,

I mean When installing code_saturne.

Though you might first simply try passing those options when running as follows:

code_saturne compile --libs="-lgdal -Wl,--no-as-needed"

Best regards,

Yvan

Hello, Running on a pure Linux machine should not change anything, and this seems to be a Qt install or version issue. Some forums recommend running with "QT_DEBUG_PLUGINS=1 " to get more debug info. Looking at those forums, causes for this issue vary, but a frequent cause is when multiple...

Hello, There may be another issue with Debian 11 and 12, which seems related to an incorrect behavior of the linker. If you add LDFLAGS=-Wl,--no-as-needed to you initial code_saturne configuration command, you might avoid the issue specific to Debian 12. I would need to automate a workaround, but th...

Hello, Looking at the directed file with a generic CGNS utility (cgnsview), it appears the boundary zone info is not present in the CGNS file, so your boundary conditions specify nonexistent zones, and BCs default to wall. Which explains why nothing happens in the simulation. So this is definitely e...

Hello, I am not familiar with the details of the Rhie & Chow implementation, though if you want to kook at it, you can search for/grep the "arak" variable in the source code (in the current dev branch, this is in src/base/cs_pressure_correction.c and cs_velocity_pressure.c). If you are...

Hello,

For the Syrthes confing in code_saturne.cfg, you need to uncomment the line containing the Syrthes path. Hope that does the trick.

Best regards,

Yvan

Hello, Since info on running under WSL is a bit "spread out", I suggest a check list : - First, did you export your display (and run an X11 server) ? Running export DISPLAY=:0 in the terminal from whihc you launch code_saturne should be enough, if you do have an X-server running. Otherwise...

Hello, OK, I obtain results similar to yours using the constant time step option. To avoid divergence, I need either to reduce the number of MPI ranks (from 48 to 4 works,), or keep the number of MPI ranks but change linear solver options to ones that are less dependent on the partitioning (ie. Jaco...

Hello,

OK thanks for the feedback. You can probably work around that restriction using an environment variable or forcing the --oversubscribe option in the MPI launch options, but that is OK. I will try to run the case on fewer processes on my side.

Best regards,

Yvan