code_saturne User's Forum

Thank you very much Yvan and Erwan. I really appreciate all you do with code_saturne. I will try the revised versions. Is it possible to get the revised v5 source from github, or is only the latest build available there?

Hi Yvan. I just downloaded and compiled v5.0.13 to see. The reason it fails to me seem related to the libhdf5 implementation and it fails in the preprocessing stage. Pecucilar that preprocessing has worked fine in the later tested versions which were compiled using the same libraries (those of Salom...

Dear Yvan, Thank you for having attention on this. Ad 1 - Robustness/convergence In my understanding unsteady solutions to flow analysis do not converge unless the model - i.e. combination of fluid domain, boundary conditions and fluid properties allows it to so to say. To me the most important thin...

Dear Christopher and Yvan. Since this seems the opportunity to promote getting functionality back into the compressible module I have made another run with the case. Based on the most recent xml file provided by Christopher except for the time settings. Yvan - Regarding negative energy error, It IS ...

While reflecting on your case ... What is your thinking about the difference between having symmetry boundary conditions on the top and bottom versus having walls as you have now?

My recommendation to You, Christopher, is to acquire a version v5.0.4 because that seems to work. As you can see from the other thread I tested several versions, including present v5.3 (Salome_CFD) and v6 and v7 (from github)which all failed to run. Unless, of course you want to try for yourself, wh...

And thank you here in this thread as well. It is very kind of you to take this topic up for further investigations. If I can assist, somehow, please let me know. here or at github where I have posted as well. I now have a fresh Debian Buster ready for testing where I can use the libraries of Salome-...

Dear Yvan.

Thank you very much. It is highly appreciated.

Dear Yvan, if you change the time step from 0.001 to 1.0e-6 the simulation will run on v5.0.4 as verified by attached animation video which I made with the latest xml input from Christopher edited ONLY on the time step setting. The video shows the first 50 time steps of 1.e-6 - long enough to show a...

... There is still another issue, in which after 2 time steps, the density becomes negative in about 1000 cells, meaning the pr,essure/temperature values are probably not in a reasonable range ... Well just a remark: Sometimes the time step size is the parameter to fit in this case. I have best res...