code_saturne User's Forum

Hello,

It seems you missed the attachment.

In any case, open boundary conditions are the trickiest. Although free inlet/outlet BC's are the correct BC to use, the GUI does not allow defining backflow conditions, so these must sometimes be completed with user-defined functions.

You should check ...

Hello,

This value is really an average, an depends on the network and processor speeds/balance, and number of nodes used. On a single node, scalabilty may be better, while on billion-cell cases running on thousands of cores, the optimum is often higher.

So for legacy FV, I always recommend ...

Hello,

The colleague who could best answer this is on holiday, but I can remind him to check your post when he returns.

In any cases, from conversations withe the colleagues working on solidification, I can confirm robust solvers are needed, and a big part of the work making these studies is ...

Hello,

For this, the bet solution is probably to use a debug build (compiled with --enable-debug), and run it under a debugger to pinpoint the issue (see https://www.code-saturne.org/documentat ... _debugging).

Best regards,

Yvan

Hello,

Which model are you referring to in the model always said mesh quality is not good ? If you are using code_saturne's mesh quality check, keep in mind that the indications are not "absolute". Quality issues detected may make it harder to converge and lead to a less stable computation, but ...

Hello,

If you modify any constant, I recommend checking the setup.log to make sure this worked as intended.

In v8.0, some constants might be duplicated in C and Fortran parts, though most should be shared.
In v9.0, since only the C definitions are used, changing them would be less risky, but note ...

Hello,

I have no idea if that is a lot of work or not. I'll remember to check with colleagues next week, though some of them might be on holiday, so I can't promise I'll get back to you right away...).

Best regards,

Yvan

Hello,

The old Fortran "divmas" subroutine was the equivalent of the current cs_divergence function, so assuming the reference uses the output od that function for the "divmas" term, you could use the output of cs_divergence to compute that.

Hoping this helps (as I have not delved into the theory ...

Hello,

In your install.log, you can see that ParMetis support is not available.
For details to understand why the detection failed in that build, you need to check the config.log file in the code_saturne build directory.

Best regards,

Yvan

Hello,

Looking at your install_saturne.log file, it seems that METIS/ParMetis support was not detected correctly, so you may have an issue in the provided path or a compatibility issue (you would need to check the config.log file in the code_saturne build directory to determine the details).

In ...