The Periodic Condition node adds a periodic boundary condition that can be used to reduce the model size by using symmetries and periodicities in the geometry and physics interfaces being modeled. This feature works well for cases like opposing parallel boundaries. In other cases, use a Destination Selection subnode to control the destination. By default it contains the selection that COMSOL Multiphysics identifies.

Select a Type of periodicity: Continuity (the default) or Antiperiodicity.

For information about the Orientation of Source section, see Orientation of Source and Destination in the COMSOL Multiphysics Reference Manual.