Add an Electrostatic Point Dipole node to 3D and 2D components. Add a contribution as a Harmonic Perturbation by right-clicking the parent node or click Harmonic Perturbation in the Physics toolbar. For more information see Harmonic Perturbation — Exclusive and Contributing Nodes in the COMSOL Multiphysics Reference Manual.

The Electrostatic Point Dipole represents the limiting case of zero separation distance between two equally strong point sources of opposing signs while maintaining the product between separation distance and source strength at a fixed value (p). The dipole moment is a vector entity with positive direction from the negative charge to the positive one.

Select a Dipole specification — Magnitude and direction (the default) or Electric dipole moment.