The Stationary, One-Way Coupled, NITF and Time Dependent, One-Way Coupled, NITF preset studies are available with the Nonisothermal Flow and Conjugate Heat Transfer interfaces. They solve for the fluid flow and heat transfer variables in two separated steps, Stationary for the former preset study, and Time Dependent for the latter.

For a fully-coupled approach, use the Stationary, Time Dependent, Stationary with Initialization, or Time Dependent with Initialization studies. See Studies and Solvers in the COMSOL Multiphysics Reference Manual for more details.