Search found 2578 matches

by Yvan Fournier
Thu Apr 18, 2019 10:25 am
Forum: Code_Saturne usage
Topic: msh preprocessing error
Replies: 4
Views: 16

Re: msh preprocessing error

Hello, The version compatibility is explained in my previous post. Basically, force Gmsh output to V2 format for all releases of Code_Saturne older than last week (there was an initial update a few months ago bug Gmsh checnged their format again from 4.0 to 4.1, so you will only get compatibility wi...
by Yvan Fournier
Thu Apr 18, 2019 8:42 am
Forum: Code_Saturne usage
Topic: Internal FSI coupling and mesh overlap
Replies: 10
Views: 61

Re: Internal FSI coupling and mesh overlap

Hello,

I am not 100% sure, but if you ensure the region where you prescribe displacement is not simultaneously handled with an internal structure (possibly using internal coupling with other boundary zones) it should be ok.

If you have a small test case I can look.

Regards,

Yvan
by Yvan Fournier
Wed Apr 17, 2019 10:42 pm
Forum: Code_Saturne usage
Topic: Wind tunnel modelling, BCs and convergence issues
Replies: 5
Views: 29

Re: Wind tunnel modelling, BCs and convergence issues

Hello, To add to the previous post, yes, monitors in Code_Saturne are usable for time averages of volume fields, including from the GUI. Surface monitors are available also but not yet from the GUI. For convergence, a rule of thumb which was quoted quite some years ago for unsteady computations was ...
by Yvan Fournier
Wed Apr 17, 2019 1:00 pm
Forum: Code_Saturne usage
Topic: msh preprocessing error
Replies: 4
Views: 16

Re: msh preprocessing error

Hello, Which version of Gmsh was the file exported from ? The Gmsh file format ha changed recently, so you may need either to use a more recent version of Code_Saturne (in you case, compiling it from the GitHub branch, as 5.0.10 is not released yet, but the updates for Gmsh are ready), or export to ...
by Yvan Fournier
Mon Apr 15, 2019 11:03 pm
Forum: Code_Saturne usage
Topic: Internal FSI coupling and mesh overlap
Replies: 10
Views: 61

Re: Internal FSI coupling and mesh overlap

Hello,

Yes, things seem to go wrong near the concave area, which is always the "tricky" part.

Did you try prescribing vertex displacements in cs_user_boundary_conditions.f90 (as per cs_user_boundary_conditions_ale_base.f90) ?

Best regards,

Yvan
by Yvan Fournier
Mon Apr 15, 2019 11:00 pm
Forum: Code_Saturne usage
Topic: Issues with creation of periodic boundaries
Replies: 1
Views: 13

Re: Issues with creation of periodic boundaries

Hello, The preprocessor only imports the mesh (or meshes) and possibly checks for orientation, so its log is relevant only for these initial stages. The actual joining is done by the solver part (it was done in the preprocessor a long time ago). So the information you need to check (between boundary...
by Yvan Fournier
Mon Apr 15, 2019 10:02 am
Forum: Code_Saturne usage
Topic: Mass flow in cs user boundary condition
Replies: 3
Views: 42

Re: Mass flow in cs user boundary condition

Hello, There is no risk in testing it, but I do not think it will work. There are some differences in the way things are handled in specific modules, which should be resolved in an upcoming unified rewrite of boundary conditions in C, but for now, you will probably get zero mass flux. Best regards, ...
by Yvan Fournier
Sun Apr 14, 2019 8:06 pm
Forum: Installation issues
Topic: cs solver doesn't take into account user routines in SRC
Replies: 1
Views: 11

Re: cs solver doesn't take into account user routines in SRC

Hello, This behavior was observed with the "packaged" version of the code on Ubuntu quite a while ago. I filed a bug remarking we had this issue while the parent Debian version worked fine, but that bug has been ignored so far. This is the first time is seems to occur with a user-compiled version. I...
by Yvan Fournier
Sun Apr 14, 2019 12:41 am
Forum: Code_Saturne usage
Topic: Ejector troubles
Replies: 2
Views: 23

Re: Ejector troubles

Hello, The steady algorithm is not very robust, so you may have better luck with the unsteady scheme, or illlas an intermediate solution, the pseudo-steady using a local time step. You flow conditions could probably benefit from th compressiblt model, but I do not know it well either. I suspect your...
by Yvan Fournier
Sat Apr 13, 2019 12:09 am
Forum: Code_Saturne usage
Topic: Internal FSI coupling and mesh overlap
Replies: 10
Views: 61

Re: Internal FSI coupling and mesh overlap

Hello, You seem to have attached only the first picture. For the easy question, RhS means "right hand side". I am not sure how the mesh velocity is computed. I would need to one of the colleagues who worked on this recently. I am not sure of how displacements are prescribed. To my knowledge, it is u...