code_saturne User's Forum

Hello, Sometimes, just a few pinched cells can cause issues, but It is hard to tell without looking at your mesh. Would it be feasible an LES on a simpler mesh, or a truncated version of this one in which you have only the "good" cells, to see if this works better, or if the issue is relat...

Hello, What type of meshes do you use ? LES in code_saturne can be quite sensitive to mesh quality and regularity. In a similar way, though centered convection schemes are needed for the conservation of energy, a very small portion of upwind (2%) might help stabilize the computation. Best regards, Y...

Hello, The guidelines are a good starting point, but need updating, and do not take into account some newer options such as the all-y+ law (in k-omega) or low-Reynolds models. I do not think they were written with the rough law model in mind, as the roughness adds an amount of user modeling, and the...

Hello, It is not possible to determine whether this is due to an issue in the code or in you user-defined functions, so you need to: - ideally, run this under under a debugger on your side, to get more details - otherwise, post you user-defined files. Also, v7.0.2 is not up to date, so you should up...

Hello, Do you also have some user-defined functions ? Checking with a colleague developing this, your Van Genuchten ks value seems a bit high (in clay, it would be closer to 1e-2 or lower). Also, the groundwater module used in the v8.0 GUI is obsolete, and replaced by the CDO-based module in v9.0. (...

Hello, The level of detail in the theory guide is unfortunately far from uniform, and some subtle implementation differences in turbulence models might not be documented (or the matching elements may be spread out over many technical reports, bugtracker issues, ... or change logs, which makes it bas...

Hello, If faces are joined for periodicity, they become interior faces, so should be selectable as interior (not boundary) faces. Combining periodicity and boundary face insertion would be another matter, as periodic faces are interior faces but one of their adjacent cell is a ghost cell, without an...

Hello, It is strange that the number of interior faces seems to decrease but the number of boundary faces remains constant. I recommend testing this with a current version of the code (v8.0 or example, or v9.0 beta). Also, you can create an additional postprocessing mesh based on you selection crite...

Hello, To use different directories, you need to create one writer per directory, using cs_post_define_writer (where you can define a separate directory for each writer) , then use "cs_probe_set_associate_writers" to assign a different writer for each probe set. In any case, if you really ...

Hello,

You cannot define the same function in multiple files, but you can define multiple probe sets in a single cs_user_postprocess_probes function.

If you have many similar probe sets, I recommend declaring them in a loop rather than copy/pasting the same instructions.

Best regards,

Yvan