Even Symmetry (Flux Tangential) for an Electric Field Solution
Use an even symmetry boundary to define a plane of symmetry where the signs (positive or negative) of the voltages and charges on one side of the plane are the same as those on the other side. Electric flux is tangential to the boundary and thus does not cross it. To define an even symmetry boundary, the simulator sets the selected edge to a Neumann boundary - acting as an electrical mirror to the model.