The average temperature on the selected boundaries can be prescribed at a node of the thermal network where an External Terminal feature of The Lumped Thermal System Interface is applied.

Select an External Terminal feature in the Source list to define which node of the thermal network provides the heat rate Pext to be prescribed on the boundary.

When the Isothermal terminal check box is not selected (default), the average temperature on the boundaries is constrained to the temperature at the terminal node of the thermal network. Select this check box to apply the constraint on the space-dependent temperature instead, which corresponds to a stronger constraint.

Physics Tab with interface as Heat Transfer in Solids and Fluids, Heat Transfer in Solids, Heat Transfer in Fluids, Heat Transfer in Porous Media, Heat Transfer in Building Materials or Bioheat Transfer selected: