Element-size assignment methods

GiD automatically corrects element sizes according to the shape of the entity to be meshed and its surrounding entities. This default option may be changed by going to the Utilities menu, selecting Preferences, and then Automatic correct sizes² inside Meshing - General branch³ .

Sometimes, however, this type of correction is not sufficient and it is necessary to indicate where on the mesh greater accuracy is needed. In these cases, GiD offers various options and methods to assign different mesh sizes.

To be sure that all the preferences are the ones used in this tutorial and get the same mesh as result, set the default values for all the preferences:

• To set as default all the meshing preferences, click on Meshing branch of the Preferences window and click on Default values on selection. This option is in the contextual menu (clicking on the left mouse button). Be sure the option 'Also selection children' is checked, so the default values will be set to all the meshing options.

² The different options are: None, no size correction is made; Normal, a size correction is made according to the sizes of geometrical entities and the compatibility between meshing sizes of neighbouring entities; Hard, the Normal correction is made and, furthermore, an automatic chordal error criteria is applied to assign sizes to surfaces which are the contours of some volume in order to improve volume meshes.
³ Similar options to Automatic correct sizes but to execute them manually one time can be found on Mesh->Unstructured->Correct Sizes...