- To mesh surfaces with a structured mesh, select the option Mesh->Structured->Surfaces->Assign number of divisions to surface lines .
- Select all top surfaces 9, 24, 26 and 12 and press ESC .
- A window appearsasking the number of divisions that the lines to be selected will have. Enter 4.
- Click Assign and select one vertical line5 (parallel to the Y axis). Press ESC .
- Another window appears in which to enter the number of divisions on the lines. Enter 6.
- Click Assign and select the 4 bottom lines5 . Press ESC .
- Another window appears in which to enter the number of divisions on the lines. In this case, all the boundary lines have already been defined. Therefore, click Close .
- Select Mesh->Element type->Triangle . Select surfaces 26 and 12. Press ESC .
- Select Mesh->Generate mesh .
- A window comes up asking whether the previous mesh should be eliminated. Click Yes .
- Another window appears in which to enter the desired element size. Leave the default value unaltered and click OK . The result is the mesh shown.
- As seen in Figures, GiD can obtain surface structured meshes made of quadrilaterals or triangles. There are two kinds of structured mesh that use triangles: the one shown in Figure 7 is obtained when the Utilities->Preferences->Meshing->Structuration type->Symmetrical structured->triangles option is set. If this option is not set, the mesh presented in the previous figure is produced (with symmetrical structured extra center nodes are created).
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5
When selecting a line, GID automatically selects all lines 'topologically parallel' to it.