Use the Heat Transfer with Radiative Beam in Absorbing Media multiphysics coupling () to model heat transfer by conduction, convection, and radiation in absorbing (semitransparent) media. The attenuation of an incident beam intensity within a semitransparent material due to absorption is determined using the Beer-Lambert Law. As the beam is absorbed it deposits energy which acts as a heat source.

It adds the radiative heat source term Q (SI unit: W/m3) to the heat transfer equation, defined by:

The Label is the default multiphysics coupling feature name.

The Name is used primarily as a scope prefix for variables defined by the coupling node. Refer to such variables in expressions using the pattern <name>.<variable_name>. In order to distinguish between variables belonging to different coupling nodes or physics interfaces, the name string must be unique. Only letters, numbers, and underscores (_) are permitted in the Name field. The first character must be a letter.

The default Name (for the first multiphysics coupling feature in the model) is htrbam1.

This section defines the physics involved in the Heat Transfer with Radiative Beam in Absorbing Media multiphysics coupling.

Select the Heat transfer in solids interface associated to the temperature dependent variable. Select the Radiative Beam in Absorbing Media interface associated to the radiative beam intensity variable.

when a heat transfer interface with any domain feature is added together with the Radiation in Absorbing Media interface with Absorbing Medium feature.