Line Charge (Out-of-Plane)
For 2D and 2D axisymmetric components, points are selected and this is the same as a line out-of-plane.
Add a contribution as a Harmonic Perturbation by right-clicking the parent node or clicking Harmonic Perturbation on the Physics toolbar. For more information see Harmonic Perturbation — Exclusive and Contributing Nodes in the COMSOL Multiphysics Reference Manual.
Use the Line Charge (Out-of-Plane) node to specify line charges along the points of a geometry for 2D and 2D axisymmetric components.
Point Selection
Beware that constraining the potential on points usually yields a current outflow that is mesh dependent.
Line Charge (Out-of-Plane)
Enter a value or expression to apply a Line charge QL (SI unit: C/m). This source represents electric charge per unit length and the default is 0 C/m.
Line Charge and Line Charge (on Axis)