The Edge Multiphysics Coupling node (

) defines a coupling feature that can only exist (have selections) on the edge geometric entity level of the current space dimension, which represents lines in all space dimensions. This feature is normally only applicable in 3D (the default restriction), but it can optionally be applicable in lower dimensions in special situations.
To add the Edge Multiphysics Coupling node, under
Building Blocks, right-click the
Multiphysics Couplings branch node to add this from the context menu. You can right-click the
Edge Multiphysics Coupling node to add many features.
The Settings window is almost identical to the
Generic Multiphysics Coupling node, except that it does not include the
Supported geometric entity levels list.