The Electric Field Coupling multiphysics node assures continuity of the electric potential across boundaries between The Electromagnetic Waves, Frequency Domain Interface and The Electromagnetic Waves, Boundary Elements Interface. The Electric Field Coupling node is available from the Multiphysics menu in the Physics toolbar or by right-clicking the Multiphysics Couplings node in Model Builder, if both The Electromagnetic Waves, Frequency Domain Interface and The Electromagnetic Waves, Boundary Elements Interface are available.

Select Manual or All boundaries from the Selection list. Make additional edits to the list of boundary entity numbers using the Selection toolbar buttons. When All boundaries is selected from the Selection list, the boundaries exterior to the Electromagnetic Waves, Frequency Domain interface that intersect the exterior boundaries to the Electromagnetic Waves, Boundary Elements interface are available in the boundary entity number list.

Select Electromagnetic Waves, Frequency Domain as Primary interface and Electromagnetic Waves, Boundary Elements as Secondary interface.