code_saturne User's Forum

Hello,

I do not think there has been any new development in this regard, though there has been work on another compressible model which may have different constraints.

Did you try forcing the pseudo-steady algorithm using a user-defined function (I.e. cs_user_parameters) ?

Best regards,

Yvan

Hello,

Yes, you can use the prescribed flux condition in this case.

Best regards,

Yvan

Hello, Not only with the GUI, but with the whole of the "legacy" finite volume scheme, Neumann BC's can only be set up relative to the normal direction relative to a boundary. Using the CDO models it is possible to define a Neumann BC using an arbitrary direction. In your case, is the z di...

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...