The Equilibrium Discharge Boundary Heat Source multiphysics coupling () maps the electromagnetic surface losses as a heat source on the boundary (SI unit: W/m2) in the heat transfer part of the model.

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 bphs1.

Select an Electrode polarity — Anode (the default) or Cathode. Enter a Surface work function Φ (SI unit: V). The default is 4.15 V.

This section is available when Cathode is selected as the Electrode polarity.

Enter an Effective Richardson’s constant A*R (SI unit: A/(m2⋅K2)). The default is 120 A/(m2⋅K2). Enter an Effective work function Φeff (SI unit: V). The default is 2.6 V.

This section is available when Cathode is selected as the Electrode polarity. Enter a value or expression for the Plasma’s ionization potential Vion (SI unit: V). The default is 15.7 V.

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

Select a Source position — Layer (the default), Upside, or Downside.

This section has the same setting information as defined under Equilibrium Discharge Heat Source.