Continuity on Interior Boundary (Radiation in Participating Media and Radiation in Absorbing-Scattering Media Interfaces)
When Discrete ordinates method is selected, this node enables intensity conservation across interior boundaries. It is the default boundary condition for all interior boundaries. For P1 approximation, this boundary condition is not available since it is not needed.
Radiative Heat Transfer in a Utility Boiler: Application Library path Heat_Transfer_Module/Thermal_Radiation/boiler
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Physics tab with Radiation in Participating Media or Radiation in Absorbing-Scattering Media selected: