Search found 4102 matches

by Yvan Fournier
Fri May 24, 2024 9:50 pm
Forum: code_saturne usage
Topic: Second-Order Temporal Discretization Except for Turbulence Model Equations
Replies: 6
Views: 223

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

Hello,

I asked a colleague, who told me trying to force 2nd order this way is risky and might ne behave well, and that a PhD student might be looking into this soon, but have no more details.

I'll keep you updated if I get more info on what can be done.

Best regards,

Yvan
by Yvan Fournier
Fri May 24, 2024 9:47 pm
Forum: code_saturne usage
Topic: Steady-Compressible flow
Replies: 6
Views: 3171

Re: Steady-Compressible flow

Hello, Yes, your setting seems OK. I am not sure the pseudo-steady algorithm matches that on your reference, as I am not familiar with the book. It would be interesting to compare. In our case, the code simply adjusts the time step in each cell so as to try to target a CFL of 1. The reference time s...
by Yvan Fournier
Sun May 19, 2024 2:43 pm
Forum: code_saturne usage
Topic: model validation
Replies: 5
Views: 134

Re: model validation

Hello, If you get different results each time, there may be some memory corruption, which indicates a bug... How large is your test case ? If it is not too big, I would be interested in running it under a tool such as Valgrind or a build using AdressSanitizer to check for a bug in code_saturne... If...
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: 6
Views: 223

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: 192

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: 5
Views: 134

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: 6
Views: 223

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: 192

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: 124

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: 124

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...