code_saturne User's Forum

Hello,

I created an Hydrofoil geometry and I meshed it in using SALOME 5.1.3. I exported the UNV file (knowing that saturne code can't read MED mesh file).

After checking the mesh, I launched the calculation and I had this error message:

        Error running the preprocessor.         Check preprocessor log (listpre) for details.          ********************************************                 Error in preprocessing stage.          ********************************************

listpre file is attached.

Thank you in advance.

Rezki

Hello,

You have the explanation  for your error at line 78 of your "listpre" file.

Regards,

  Yvan

Indeed Code_Saturne only handles volumic elements. To use a 2d-mesh, you need to extrude the mesh (a 1-cell extrusion, with symmetry applied as boundary conditions) along the right direction (z in your case).
David

Hi David,

Thank you for your help, I extrude the mesh in SALOME and it works. But When I introduced boundary conditions while keeping the  color references (selection criteria) which appears in SALOME (28 and 35 for inlet for example), the code don't know these colors. and I have an error message :
          Le groupe ou attribut "28" figurant dans le critère de sélection: "28 and 35"  ne correspond à aucune face de bord. Please, How to make to know the color references associated to each condition through Saturne ? listing file is attached. Regards. Rezki

Hello,

The selection criteria apply for each face, so "28 and 35" would select only faces that belong to 2 (overlapping) groups with colors 28 and 35. To select either 28 or 35, use "28 or 35".

Regards,

  Yvan

Hi Yvan,

I try to use "or" instead of "and" but I have same error for each boundary conditions which I introduced :

      Code_Saturne : /home/rezki/saturne/installer/ncs-2.0.0-rc1/src/base/cs_gui_boundary_conditions.c:1090 : Avertissement
      Le groupe ou attribut "28" figurant dans le critère de sélection: "28 or 35" ne correspond à aucune face de bord.
      Le groupe ou attribut "4" figurant dans le critère de sélection: "4"  ne correspond à aucune face de bord.
      Le groupe ou attribut "21" figurant dans le critère de sélection: "21 or 14" ne correspond à aucune face de bord.
      Le groupe ou attribut "46" figurant dans le critère de sélection: "46 or 49" ne correspond à aucune face de bord.
 
More informations about the mesh quality is attached here.

Regards.

Rezki

Hello,

Looking at the beginning of you mesh information (the equivalent of "listpre"), it seems that you have groups Symmetry, Walls_3D, inlet_3D, or outlet_3D, and not 28, 35, ...

I am not sure what color references you used in SALOME: you may assign a color to a group, and that should appear under Code_Saturne (it was useful in the past, when colors were easier to handle then groups in Code_Saturne, but since version 1.3, the group name should be preferable). You may also set colors for visualization, but those are not passed to Code_Saturne.

In any case, prefer group names to colors in Code_Saturne when available (such as when meshing with SALOME).

Regards,

  Yvan

Hello,

Ok, so you checked my mesh file and you find that I have just one color (color
7) for all groups, knowing that I created four groups in SALOME
(inlet_3D, outlet_3D, Walls_3D and Symmetry)

Please, which is an exactly criteria which I should to introduced in
"Selection criteria"  ? (reference face which appears in
SALOME mesh, color, Famille, groups......)

If the answer is "color", why I have just one (color 7) ?

Thank you in advance.

Rezki

Rezki,

I don't why you have a single color, but this doesn't matter as you have group names.

As Yvan told you "In any case, prefer group names to colors in Code_Saturne when available (such as when meshing with SALOME)" and as it is written in the user documentation "code_saturne info -g user" (page 31, chapter Face and cell mesh-defined properties and selection), you can directly use the group names.

So, just use inlet_3D for the inlet, outlet_3D for the outlet, ...

David

Hello,

The problem is resolved by using groups which I named inlet_3D,....

Yvan, David, I am grateful for your help, thank you very much.

Best regards.

Rezki