As usual we will generate a 2D mesh by means of GiD's meshing facilities.
The mesh will be finer in the vicinity of the cylinder. Therefore we will assign a size of 0.03 to the cylinder lines and points and a size of 0.1 to the symmetry line. The global size of the mesh is chosen of 0.3, at an Unstructured size transition (Meshing Preferences window) of 0.5. These values have been chosen by a 'trial and error'-procedure, i.e. first some approximate values are chosen, out of experience and/or practical considerations. With these parameters a mesh is generated. If the obtained number of nodes is too large[1] or too small[2], the parameters need to be adjusted correspondingly.
Finally, we will obtain the unstructured mesh shown in Figure 92, consisting of 2812 nodes and 5386 triangle elements:
Figure 92 Generated mesh |
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