Field sources in Electrostatics
QuickField provides possibility to specify electric charges located in blocks, at the edges or at the individual vertices of the model.
The electric charge specified at a point of the xy-plane corresponds to a charged string, which is perpendicular to the plane of the model, and is described by the linear charge density.
In axisymmetric case the vertex charge represents a charged circle around the axis of symmetry or a point charge located on the axis. To incorporate both these cases a total charge value is associated with the vertex.
For the charged circle the total charge is connected with its linear density by the relationship
q = 2πrρ.
Edge-bound charge in the plane of model represents a surface-bound charge in three-dimensional world. It is described by surface charge density and is specified by the Neumann boundary condition for the edge. The charge density associated with a block is equivalent to the space charge.