RF MODULE

4 Click the Init tab and type 0 in the dT(t 0 ) edit field.
5 Click OK.
MESH GENERATION
The steps to generate the mesh involve interactive meshing, where you use the
standard free meshing for the head, patch, and surrounding air. For the PML regions,
use swept meshing. This gives more control of the mesh resolution in the absorbing
direction, which is crucial to get convergence with iterative solvers.
1 From the Mesh menu, choose Free Mesh Parameters.
2 Select Coarser from the Predefined mesh sizes list.
3 Click the Edge tab, select all edges of the patch facing the head (Edges 132–135,
137–138, 140–142, and 149). Enter 2e-3 in the Maximum element size edit field.
4 Click the Boundary tab, select Boundaries 73 and 78, enter 0.4 in the Mesh curvature
factor edit field, and enter 0.01 in the Mesh curvature cutoff edit field.
5 Click the Subdomain tab, select Subdomain 19 and enter 0.015 in the Maximum
element size edit field.
6 Select Subdomains 14, 19, and 20, and click the Mesh Selected button.
7 Click OK to close the Free Mesh Parameters dialog box.
8 Open the Swept Mesh Parameters dialog box from the Mesh menu.
9 Select the Subdomains 5, 11, 13, 15, 17, and 25. These are the PML regions with
absorption in a single direction.
10 Select the Manual specification of element layers check box, and enter 4 in the Number
of element layers edit field.
11 Click the Mesh Selected button.
12 Select the Subdomains 2, 4, 6, 8, 10, 12, 16, 18, 22, 24, 26, and 28. These are the
PML regions with absorption in two directions.
13 Click the Mesh Selected button. This creates hex elements in the selected regions.
14 Click the Select Remaining button and then click the Mesh Selected button. This
creates hex elements in the remaining PML regions.
15 Click OK to close the dialog box. The final mesh is a mix between tetrahedron
elements and prism elements.
ABSORBED RADIATION (SAR) IN THE HUMAN BRAIN | 153