Mesh Generation

As usual we will generate a 3D tetrahedral mesh by means of the Pre-processor meshing facilities.

Size assignment

In order to capture accurate enough the phenomena, the mesh will be finer in the vicinity of the cylinder and in the surfaces between the volumes.

We will assign a size of 0.03 to the cylinder surfaces, lines and points and a size of 0.1 to the symmetry surfaces and lines (see Figure 29). A global size of the mesh of 0.2, at an “Unstructured size transition” of 0.6 is chosen.

Figure 29 Mesh size assignment

Again, remember to apply the Mesh->Surfaces option of the Mesh criteria menu to the surfaces of the control domain to transfer the boundary conditions to the mesh (it also can be done using the corresponding icon).

Finally, we will obtain the unstructured mesh shown in Figure 30, consisting of about 25000 nodes and 120000 tetrahedral elements.

Figure 30 Generated mesh