If multiple mesh override regions are present, the meshing algorithm will use the override region that results in the smallest mesh for that volume of space. Constraints from mesh override regions always take precedence over the default automatic mesh, even if they result in a larger mesh size.
The 'min mesh step' setting in the solver - Mesh settings tab determines the absolute global minimum mesh size allowed in the simulation. This setting takes precedence over all other mesh constraints, including mesh override regions.
General tab
The General tab includes options to override the mesh size. If multiple mesh override regions are present, the meshing algorithm will use the override region that results in the smallest mesh for that volume of space. Constraints from mesh override regions always take precedence over the default automatic mesh, even if they result in a larger mesh size.
Set maximum mesh step
Set the desired mesh size.
- OVERRIDE X/Y/Z MESH: Override the x, y, or z direction mesh settings
- dx, dy, dz: Respective maximum mesh step
Set equivalent index
Alternatively, since the mesh spacing is usually determined by the refractive index of the materials in the simulation, it is possible to set an EQUIVALENT INDEX that will be used to determine the mesh spacing. A higher index will lead to a finer mesh.
- OVERRIDE X/Y/Z MESH: Override the x, y, or z direction mesh settings
- EQUIVALENT X/Y/Z INDEX: Respective index in x, y, and z directions
Geometry tab
Directly defined
This option allows users to define the desired mesh override position and span directly.
Based on a structure
This option allows users to parametrize the mesh override position and span based on an existing structure object or structure group.
- STRUCTURE: Accepts a string input corresponding to the name of an existing structure or structure group in the object tree. The center position and the X, Y, Z spans of the named structure will be used to set the mesh override position and spans respectively.
- BUFFER: Accepts positive integer values by which the X, Y, Z MIN, and MAX positions of the mesh override region are extended outwards in all directions. This field can also be used for refining the mesh along the normal direction of 2D surface objects where the object has no thickness.