Ansys Lumerical CHARGE Solver — Lesson 3

CHARGE Solver

In this video lesson, you will learn about the basic settings under various tabs of the CHARGE Solver object. Detailed information about the Transient and Small signal ac tabs can be found in the Lumerical CHARGE — Small-Signal AC and Transient Simulations course.

Alternate video link.

Mesh Constraint

The mesh constraint object is used to override the default mesh settings in some parts of the simulation region. Normally the meshing parameters are set by the global mesh settings in the solver object. However, if some specific meshing conditions are required in the part of the simulation region, a mesh constraint object can be used to locally refine the mesh in any desired area.

The object can be added from the “Solver” section under the “CHARGE” tab and will appear as a child of the CHARGE solver object in the Objects Tree. You can add as many mesh constraint objects as needed in a single simulation.

Geometry type

You can define the geometry by directly specifying the x, y, z positions and spans of the object or by associating it with a structure or simulation domain. The volume type option allows automatic adjustment of the mesh constraint position and span when the volume associated with the mesh is modified.

Volume type

SOLID: Select the target solid. The solid can be a geometry object or a structure group.
DOMAIN: Select the target domain. The reference geometry is the volume of the selected domain. The desired domain can be identified while being in partitioned volume mode.
ALL DOMAIN: The reference geometry is the volume of all domains (the entire simulation region).

Maximum edge length

The maximum allowed edge length of a triangle (in 2D) or tetrahedron (in 3D) element within the area or volume of the mesh constraint object. A smaller number will result in a more refined mesh.