The Nonisothermal Flow, Viscoelastic Flow Interface
When the Viscoelastic Flow multiphysics interface () is added from the Fluid Flow>Nonisothermal Flow branch of the Model Wizard or Add Physics windows, the Heat Transfer in Fluids and the Viscoelastic Flow interfaces are added to the Model Builder.
In addition, the Multiphysics node is added, which automatically includes the multiphysics coupling feature Nonisothermal Flow.
The Multiphysics Branch in the COMSOL Multiphysics Reference Manual.