Search found 4099 matches

by Yvan Fournier
Sat May 18, 2024 12:33 am
Forum: code_saturne usage
Topic: Second-Order Temporal Discretization Except for Turbulence Model Equations
Replies: 3
Views: 89

Re: Second-Order Temporal Discretization Except for Turbulence Model Equations

Hello,

Any detailed feedback on this is very welcome :-)

Best regards,

Yvan
by Yvan Fournier
Sat May 18, 2024 12:32 am
Forum: code_saturne usage
Topic: Cannot use TVD schemes
Replies: 9
Views: 110

Re: Cannot use TVD schemes

Hello, Yes, I would have been interested in testing this for some cases to improve robustness, but was stuck at this point, and am already too busy with other parts of the code to realistically expect to work on this in the near future. But helping others do it might add a bit of leverage. Best rega...
by Yvan Fournier
Fri May 17, 2024 1:16 pm
Forum: code_saturne usage
Topic: model validation
Replies: 2
Views: 39

Re: model validation

Hello, What do you mean by "calculation gets corrupted" ? - Does the code crash on an invalid memory access error ? - Or are the results bad/unexpected ? If the code runs but provides incorrect results, you may have a mesh quality issue. Notably, if cells inserted in the viscous layer have...
by Yvan Fournier
Fri May 17, 2024 12:57 pm
Forum: code_saturne usage
Topic: Second-Order Temporal Discretization Except for Turbulence Model Equations
Replies: 3
Views: 89

Re: Second-Order Temporal Discretization Except for Turbulence Model Equations

Hello, I know the handling of "per variable" time scheme is a complicated mess, with some options that have been available for years but never really tested, and others which may be missing but would make sense. I am not too well versed in this part of the code, but will ask some colleague...
by Yvan Fournier
Fri May 17, 2024 12:51 pm
Forum: code_saturne usage
Topic: Cannot use TVD schemes
Replies: 9
Views: 110

Re: Cannot use TVD schemes

Hello, I'm not sure what would be best here. I'm not fond of working on a component by component basis for vectors, which should be invariant wrt the frame of reference. I'll need to discuss this with colleagues who participated in the implementation of the scalar schemes. Obviously, since the code ...
by Yvan Fournier
Fri May 17, 2024 12:47 pm
Forum: Installation issues
Topic: Problem installing Scotch - automatic installation
Replies: 4
Views: 59

Re: Problem installing Scotch - automatic installation

Hello,

The error is line 1957:

configure:16686: error: cannot find PyQt5 support (>= 5.0) or PyQt4 support (>= 4.5), Graphical User Interface cannot be installed.

You need to install the prerequisites or disable the GUI.

Regards,

Yvan
by Yvan Fournier
Thu May 16, 2024 8:19 pm
Forum: Installation issues
Topic: Problem installing Scotch - automatic installation
Replies: 4
Views: 59

Re: Problem installing Scotch - automatic installation

Hello, I would guess you do not have MPI on.your machine. It is strongly recommended to install it with code_saturne. Scotch is optional, and useful only if you have MPI. Also check these recommendations : https://github.com/code-saturne/code_saturne/wiki/Pre-installation:-Linux-distribution-package...
by Yvan Fournier
Wed May 15, 2024 9:45 pm
Forum: code_saturne usage
Topic: Cannot use TVD schemes
Replies: 9
Views: 110

Re: Cannot use TVD schemes

Hello, I am not sure about this. I checked the code today, and I seeat least some schemes require defining a min/max value which is easy to define for scalarsbet less so for vectors (I.e. do we limit the norm or the components, or a combination thereof ?). And as far as I know, the other options all...
by Yvan Fournier
Mon May 13, 2024 8:45 pm
Forum: code_saturne usage
Topic: Cannot use TVD schemes
Replies: 9
Views: 110

Re: Cannot use TVD schemes

Hello, The issue is probably that not all schemes implemented on scalars were implemented for velocity. The implementation goes back to a few years, but was not really used since it was not available in the GUI and poorly documented. Since these schemes were only strongly tested on a 1D verification...
by Yvan Fournier
Mon May 13, 2024 8:41 pm
Forum: code_saturne usage
Topic: Convergence issues with CGNS mesh from Star-CCM+
Replies: 3
Views: 61

Re: Convergence issues with CGNS mesh from Star-CCM+

Hello, The residuals definition might vary from code to code, so its interpretation also. The definition used is in https://www.code-saturne.org/documentation/8.1/doxygen/src/cs_ug_output.html, at "Analyzing the output/Checking the convergence". Even on a "converged" computation,...