Search found 4157 matches

by Yvan Fournier
Fri Nov 08, 2024 11:45 pm
Forum: code_saturne usage
Topic: Thermal flow boundary treatment using Neumann/Dirichlet boundary conditions
Replies: 1
Views: 60

Re: Thermal flow boundary treatment using Neumann/Dirichlet boundary conditions

Hello, I see you have used different BC types (Dirichlet or Neumann) for different velocity components, and I doubt this will work. I am not sure which BC type will be used, but the processing of the user-defined BC conditions into the coefa/coefb values described in the theoretical documentation in...
by Yvan Fournier
Fri Nov 08, 2024 11:33 pm
Forum: code_saturne usage
Topic: creating profiles in v7.1.1
Replies: 1
Views: 38

Re: creating profiles in v7.1.1

Hello, You also need to tell the probe set which field values to plot : - Either using cs_user_postprocess_values, as per the example. - Or calling cs_probe_set_auto_var(pset, true); after the probe set creation to simply output all fields output with regular probes (i.e. as set in the GUI). You can...
by Yvan Fournier
Thu Nov 07, 2024 12:45 am
Forum: code_saturne usage
Topic: output velocity data at each time step from the cell centers
Replies: 5
Views: 339

Re: output velocity data at each time step from the cell centers

Hello, It still seems you are opening "output.log" and looping on the global count with no filter on the MPI rank doing this operation. And the global count (parallel sum) bfore the call to cs_parall_allgather_r is commented. Unless I missed something, since you code indentation is inconsi...
by Yvan Fournier
Thu Nov 07, 2024 12:23 am
Forum: code_saturne usage
Topic: Epsilon output in Launder Sharma model
Replies: 1
Views: 35

Re: Epsilon output in Launder Sharma model

Hello, Not sure about this. In any case, the variable output for preprocessing should directly be the one solved (except possibly for some clipping). The Launder Sharma model is only used in a few specific cases as far as I know, so even the main turbulent experts in the code might not have very &qu...
by Yvan Fournier
Fri Nov 01, 2024 5:45 pm
Forum: code_saturne usage
Topic: output velocity data at each time step from the cell centers
Replies: 5
Views: 339

Re: output velocity data at each time step from the cell centers

Hello, You are computing g_ii before filtering the cells in the zones, so your counts can't match. Also, if you open your file on al ranks, you may have multiple issues. Do you need to do this once or twice or automate it ? You could probably do all of this easily in ParaView, selecting a zone in a ...
by Yvan Fournier
Thu Oct 31, 2024 2:56 pm
Forum: code_saturne usage
Topic: Restart with new mesh
Replies: 4
Views: 309

Re: Restart with new mesh

Hello, Regarding the EBRSM model, I'll let Jean-François provide more details or recommendations. Otherwise, regarding interpolation, the problems you will have or not have probably simply depends on the target mesh. Simply running a few iterations from start on that mesh should give you an idea of ...
by Yvan Fournier
Wed Oct 30, 2024 11:58 am
Forum: code_saturne usage
Topic: Restart with new mesh
Replies: 4
Views: 309

Re: Restart with new mesh

Hello, The issue seems to be that the mesh quality is bad, or for example you have very thin and warped or non-orthogonal cells at the boundary. This will cause convergence issues with all variables unless you deactivate flux reconstruction. You may also try to use the mesh robustness options (check...
by Yvan Fournier
Wed Oct 30, 2024 11:52 am
Forum: code_saturne usage
Topic: output velocity data at each time step from the cell centers
Replies: 5
Views: 339

Re: output velocity data at each time step from the cell centers

Hello,

Are you running on a single processor ? Your code will definitely not work correcty when using MPI parallelism.

Best regards,

Yvan
by Yvan Fournier
Wed Oct 30, 2024 11:48 am
Forum: Discussion
Topic: User meeting schedule
Replies: 10
Views: 35564

Re: User meeting schedule

Hello,

The meeting is not scheduled yet, but will probably be held in late summer or fall of 2025 (after the release of 9.0).

Best regards,

Yvan
by Yvan Fournier
Wed Oct 30, 2024 11:47 am
Forum: Installation issues
Topic: MPI Installation on Cray EX HPC
Replies: 3
Views: 361

Re: MPI Installation on Cray EX HPC

Hello, Yes, we have encountered this, and modified the src/fvm/fvm_to_ensight_case.c (now .cpp) file accordingly, to replace ":" with ".". This is due to MPICH's ROMIO MPI-IO library reserving the ":" in filename for its own purpuses (i.e. some interpretation of metadat...