Mesh criteria |
Menu: Mesh->Mesh criteria
GiD provides five different criteria to generate the mesh. The Default option skips meshing the boundaries, that is, lines for surface meshes and surfaces for volume meshes.
The Mesh option lets you choose the entities to be meshed, while the No Mesh option does the opposite.
The Skip option forces GiD to skip a geometrical entity when meshing (so the entity will not have mesh), while the No Skip option forces GiD not to skip the geometrical entity (so the entity will have mesh) when the RJUMP surface mesher is used (see Preferences -> Meshing).
The Automatic skip option lets GiD decide if the geometrical entity should be skipped or not skipped when the RJUMP surface mesher is used. This decision is taken according to the tangency between entities: those entities that are tangent enough will be skipped when meshing.
Using the Skip by... option user can apply some of the usefull following criteria to select the entities to be skipped, not to be skipped or to be skipped automatically.
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The Force points to option forces the selected points to belong to the surface or volume mesh, even though they do not necessarily belong to the surface or the volume.
Use the Duplicate option when you want to create a discontinuity in the mesh in a particular place by duplicating nodes. This is interesting, for example, when dealing with very thin shapes where it is difficult to represent the domain with two overlapped surfaces, and it is easier to have a single surface marked with this meshing option (like sails embedded in a volume, material cracks, etc.).
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It is possible to mark lines embedded in a 2D domain, or surfaces in the case of 3D domains.