Preprocessor tutorial — Concentric spherical shells

In this tutorial, the aim is to set up the model and settings file in order to generate the input for POLARIS. The model analyzed here is discussed in Concenctric spherical shells.

Import and view

To begin with, we open https://www.tailsit.com/polaris_preprocessor and load concentricSpheres.mesh under Select mesh file from the folder share/examples/concentricSpheres. One should obtain the following view.

View of imported mesh with hidden regions

Note that only the innermost surface has been made visible to later select well the regions in the surface declarations.

Domains

The domain consists of two dielectric materials.

Inner dielectric domain

Outer dielectric domain

Moreover, there are the two electrodes of the inner- and outermost surfaces. The final constellation looks like in the following picture.

Declaration of domains

The domains can also be stored in a JSON file, see Concentric spheres - domains.

Surfaces

Here, we declare the status of the three surfaces from inner- to outermost. The middle surface is an interface between the two dielectric materials.

Innermost surface

Surface declarations

The surfaces can also be stored in a JSON file, see Concentric spheres - surfaces.

Solver

The solver settings are the same as in Sphere and Bicone.