You are viewing the documentation for an older COMSOL version. The latest version is available here.
The Radiation in Participating Media Interface
The Radiation in Participating Media (rpm) interface (), found under the Heat Transfer>Radiation branch (), is used to model radiative heat transfer inside participating (semitransparent media) media.
This physics interface doesn’t compute the temperature field and requires it as a model input. If the medium does not participate in the radiation (transparent medium), then use The Surface-to-Surface Radiation Interface instead.
The radiative intensity equations defined in participating media domains correspond to a P1 approximation, or to the discrete ordinates method approximation equations, depending on the selected approximation.
When the physics interface is added, these default nodes are added to the Model Builder: Participating Medium and Opaque Surface. In addition, when Discrete ordinates method is selected, Continuity on Interior Boundary is also added. Right-click the main node to add boundary conditions or other features. Then, from the Physics toolbar, add other nodes that implement, for example, boundary conditions. You can also right-click Radiation in Participating Media node to select physics features from the context menu.
In this section:
•
Settings for the Radiation in Participating Media Interface
•
Feature Nodes for the Radiation in Participating Media Interface