In the “Mesh settings” tab, you can set the number of mesh cells in each direction,
or the size of each mesh cell.
When setting up an FDE simulation, you should always start with a coarse mesh and perform
some convergence testing by making the mesh smaller.
You can use a mesh override region to make the mesh smaller in
Typically, the mesh should be smaller near complex structures, near material interfaces
and where the field profile changes rapidly.
In such case, the actual number of mesh cells may be increased from the specified number
in the “Mesh settings” tab of the FDE region.
Note that, in contrast to FDTD, it is not necessary to make the mesh smaller in high
In the “General” tab of the mesh override object property window, you can select which
direction to override and the mesh step size in each direction either directly, or by applying
The mesh override region will attempt to create a mesh with an integer number of mesh cells
over the span of the mesh override region, so if the span of the mesh override region
is not integer divisible by the specified dx, dy, or dz setting, then the mesh step
size that is used may be rounded down so that the mesh override region will include an integer
number of mesh cells.
In the “Geometry” tab of the mesh override region, the geometry of the override region
can be specified directly, or you can use the “based on a structure” option to specify
the name of an object or structure group that you want the mesh override settings to apply
If you specify the name of an object and there are multiple objects with the same name, the
mesh settings will apply to all the objects with that name.
If you specify the name of a structure group, the mesh override settings will apply to the
full span of the area including the objects in the structure group.