The Internal Film Resistance subnode is available from the context menu (right-click the
Wall Heat Transfer parent node) or from the
Physics toolbar,
Attributes menu. Use it to define the film resistance.
The default Internal film resistance model is
Automatic and the Nusselt number is computed as described in the section
Theory for the Heat Transfer in Pipes Interface. For
User defined enter a value for the
Nusselt number (dimensionless). The default is 3.66.