This node can be added to pairs. When the Radiation discretization method is Discrete ordinates method, it prescribes that the radiative intensity field I is continuous across the pair. When the Radiation discretization method is P1 approximation, it prescribes that the incident radiation field G is continuous across the pair. Continuity is only suitable for pairs where the boundaries match.

Choose the pair to apply this condition to. A pair must be created first. See Identity and Contact Pairs in the COMSOL Multiphysics Reference Manual for more details.

To display this section, click the Show More Options button () and select Advanced Physics Options in the Show More Options dialog box.

The Constraint settings can be set to Pointwise constraints (default) or Weak constraints. Select Weak constraints to replace the standard constraints with a weak implementation.

Physics tab with interface as Radiation in Participating Media or Radiation in Absorbing-Scattering Media selected: