GENERATING THE MESH

Now that the part has been drawn and the volumes created, the mesh may be generated. First we will generate a simple mesh by default.

Depending on the form of the entity to be meshed, GiD performs an automatic correction of the element size. This correction option, which by default is activated, may be modified in the Meshing card of the Preferences window, under the option Automatic correct sizes . Automatic correction is sometimes not sufficient. In such cases, it must be indicated where a more precise mesh is needed. Thus, in this example, we will increase the concentration of elements along the profile of the wheel by following two methods: 1) assigning element sizes around points, and 2) assigning element sizes around lines.

Generating the mesh with assignment of size around points

Footnote: Another option equivalent to view rotate angle -90 90 is RotatePlane XY ,located in the mousemenu.

Figure 33. Side view of the part.

Figure 34. The selected points of the wheel profile

Figure 35

Figure 36. Mesh with assignment of sizes around the points on the wheel profile

Generating the mesh with assignment of size around lines

Figure 37. Selected lines of the wheel profile

Figure 38. Mesh with assignment of sizes around lines

Generating the mesh by default

Figure 28. The window in which the maximum element size is entered

Figure 29. The window with information about the mesh generated

Figure 30. The mesh generated with default settings

Figure 31. Mesh visualized with the MeshView mesh boundary option

Figure 32. Mesh visualized with MeshView mesh boundary combined with RenderFlat.

NOTE : To visualize the geometry of the model use View->Mode->Geometry . To visualize the mesh use View->Mode->Mesh .