Temperature
Use this node to specify the temperature somewhere in the geometry, for example, on boundaries.
Pair Selection
If this node is selected from the Pairs menu, choose the pair on which to apply this condition. A pair has to be created first. See Identity and Contact Pairs in the COMSOL Multiphysics Reference Manual for more details.
Temperature
The equation for this condition is T = T0, where T0 is the prescribed temperature on the boundary. For User defined, enter a value or expression for the Temperature T0. Else, select an Ambient temperature defined in an Ambient Thermal Properties node under Definitions.
Constraint Settings
To display this section, click the Show button () and select Advanced Physics Options. By default Classic constraints is selected. Select the Use weak constraints check box to replace the standard constraints with a weak implementation. Select the Discontinuous Galerkin constraints button when Classic constraints do not work satisfactorily.
The Discontinuous Galerkin constraints option is especially useful to prevent oscillations on inlet boundaries where convection dominates. Unlike the Classic constraints, these constraints do not enforce the temperature on the boundary extremities. This is relevant on fluid inlets where the temperature condition should not be enforced on the walls at the inlet extremities. Note that Discontinuous Galerkin contraints are not supported for resistive thin layers or with turbulent wall functions.
You can specify a harmonic variation of the temperature value in a frequency domain analysis of perturbation type, by adding a Harmonic Perturbation subnode. See Theory for Harmonic Heat Transfer for more details.
Steady-State 2D Axisymmetric Heat Transfer with Conduction: Application Library path Heat_Transfer_Module/Tutorials,_Conduction/cylinder_conduction
Location in User Interface
Context menus
 Heat Transfer>Temperature
Heat Transfer in Solids>Temperature
Heat Transfer in Fluids>Temperature
Heat Transfer in Porous Media>Temperature
Bioheat Transfer>Temperature
 Heat Transfer in Solids>Pairs>Temperature
Heat Transfer in Fluids>Pairs>Temperature
Heat Transfer in Porous Media>Pairs>Temperature
Bioheat Transfer>Pairs>Temperature
Ribbon
Physics Tab with interface as Heat Transfer, Heat Transfer in Solids, Heat Transfer in Fluids, Heat Transfer in Porous Media, Heat Transfer in Building Materials or Bioheat Transfer selected:
Boundaries>interface>Temperature
Pairs>interface>Temperature