Generating the mesh

Now that the model is finished, it is ready to be meshed. The mesh will be generated using Chordal Error in order to achieve greater accuracy in the discretization of the geometry. The chordal error is the distance between the element generated by the meshing process and the real profile of the model. By selecting a sufficiently small chordal error, the elements will be smaller in the zones with greater curvature.

Generating the mesh using Chordal Error

1. Choose the option Meshing Assign Sizes By Cordal error.

2. The minimum element size is automatically chosen

3. GiD asks for the maximum element size. Enter 10 on the command line.

4. GiD asks for the chordal error. Enter 0,1.

5. Choose Meshing Generate.

6. A window comes up in which to enter the maximum element size of the mesh to be generated. Leave the default value provided by GiD unaltered and click OK.

7. When the meshing process is finished, a window appears with information on the mesh that has been generated. Click OK to visualize the mesh.

8. Choose Meshing Boundaries to see only the contour of the volumes meshed but not their interior.

9. This way, the visualization may be rendered using the various options on the Render menu, located on the mouse menu.

NOTE: By default GiD corrects element size depending on the form of the entity to mesh. This correction option may be deactivated or reactivated in the Preferences window on the Meshing card under the name Automatic correct sizes.

Figure 34. The mesh generated for the piece