6. Operand VERSION

Since version 1.35, the meshes accepted by GMSH (in post-processing) have been the POI1, SEG2, TRIA3, QUAD4, TETRA4, HEXA8, PENTA6, PYRAM5 meshes, since version 1.35, which corresponds to:

VERSION = “1.2” which is the by default

If you need to visualize the fields with an old version of GMSH or if you want to cut all the cells into POI1, SEG2, TRIA3 and TETRA4, you use VERSION = “1.0”.

To be able to visualize the views with GMSH, the mesh is modified to have only GMSH meshes. Currently, PYRAM13 stitches are not treated.

• SEG3 is broken down into 2 SEG2,

• SEG4 is broken down into 3 SEG2,

• TRIA6 is broken down into 4 TRIA3,

• TRIA7 is broken down into 4 TRIA3,

• QUAD4 is broken down into 2 TRIA3 (split only if VERSION =”1.0”),

• QUAD8 is broken down into 6 TRIA3,

• QUAD9 is broken down into 6 TRIA3,

• TETRA10 is broken down into 8 TETRA4,

• PENTA6 is broken down into 3 TETRA4 (split only if VERSION =”1.0”),

• PENTA15 is broken down into 16 TETRA4,

• PYRAM5 is broken down into 2 TETRA4 (split only if VERSION =”1.0”),

• the HEXA8 is broken down into 6 TETRA4 (cut out only if VERSION =”1.0”),

• HEXA20 is broken down into 24 TETRA4,

• HEXA27 is broken down into 48 TETRA4.

Note 1

The TRIA7 (resp. QUAD9) is divided as the TRIA6 (resp. QUAD8) because the central node does not carry a degree of freedom of movement in modelling COQUES_3D.

Note 2

With recent versions of GMSH ( \(>1.60\) ), you could avoid splitting items. The choice is not available in Code_Aster because it is possible to read the MED format in GMSH since version 2.0.