code_saturne User's Forum

Hello,

The issue here does not seem to be the mesh quality, but the fact that you have overlapping zone definitions.

Please check your boundary zone selection criteria definitions.

Regards,

Yvan

Hello, This error means a CGNS library call (cg_is_cgns) checking that the file is indeed a CGNS file has failed. This could be a bug in the CGNS library (we have tested 4.1.2, 4.4.0, and some 4.3 versions I think, but I am not sure about 4.1.0), and install issue (if CGNS is not built with HDF5 sup...

Hello,

This should be in the code_saturne usage section, so I may move this topic to that section soon.

The preprocessor log you posted explains the problem: you have only meshed the cylinder's surface, not its volume. So you need to fix your mesh.

Regards,

Yvan

Hello, 1) I think this is the zone of the volume. 2) If you need to compute some combination of z and z_gound, I would use ParaView's calculator. There is also a calculator in the development branch of code_saturne, but I would recommend using the combination that requires the smallest volume of I/O...

Hello,

Could you follow the forum usage recommendations and provide the relevant logs ?

On the cluster, are you starting the code from the GUI or "code_saturne submit" ? Is the post-install (etc/code_saturne.cfg) step done ?

Regards,

Yvan

Hello, Yes, this is the default : except for test runs of 10 iterations or less, there is a checkpoint every 1/4 of the total number of iterations required. Again, do you know if there was an "upgrade"/maintenance of some librairies on your cluster ? Do you have access to other MPI librari...

Hello, With version 8.1, you should not have the code_saturne "race condition" bug. So this might be a problem in the system. Did you reproduce it a second time ? On our machine, we had the issue with OpenMPI 4 and 4.1 (less frequent with 4.1), but this depends on lower level elements of t...

Hello, I forgot to ask/you forgot to remind me which version of the code you are using. There was in issue in the restart code some time ago (more then 2 years if I remember) where we could also have a race condition leading to the behavior you observe. Otherwise, if the issue only happened once, tr...

Hello, What type of machine/compute environment are you running on, how many MPI ranks do you use, and how long has the code been running ? This seems to be a hang when writing an intermediate checkpoint file, and may have similarities with some issues we encountered on a cluster following a system ...

Hello,

Yes, check in body forces.

Yvan