Concentric annulus mesh

1. Select General Mesher in the Mesh Panel.
2. Select CAD Surfaces top_surface, bottom_surface, inner_radius and outer_radius in the Geometric Entities Panel.
3. Click Add Surfaces of the CAD Surfaces in the Properties Panel.
4. Enter Mesh Name as Concentric_annulus, Maximum Cell Size as 0.005 and Minimum Cell Size as 0.0005 in the Properties Panel.
5. Click Create Mesh. A new mesh Concentric_annulus is created under Built Meshes in the Geometric Entities Panel.
6. The meshed volume Concentric_annulus is generated under Volumes.