Temperature (Thin Layer, Thin Film, Fracture, and Heat Transfer in Shells)
Use this subnode to specify the temperature on a set of lines (geometrical edges in 3D or geometrical points in 2D and 2D axisymmetric) that represent the boundaries of a thin domain (layer, film, fracture, or shell). Only edges (3D) or points (2D and 2D axisymmetric) adjacent to the boundaries can be selected in the parent node.
Layer Selection
Select the applicable layers (the default setting is All layered materials) defining the required material properties for the node.
If no layered materials have been included yet, there is a shorthand available for creating a Single Layer Material, a Layered Material Link, or a Layered Material Stack (the plus, next to the Layered Material list).
When a layered material stack or link is selected from the Layered Material list, unselect the check boxes corresponding to layers where the node should not be applied in the Selection table.
You can visualize the selected layered materials and layers in each layered material by clicking the Layer cross section preview and Layer 3D preview buttons.
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For a general description of layer and interface selections, see The Layer Selection and Interface Selection Sections.
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You can provide material parameters with a through-thickness variation by explicitly or implicitly using expressions containing the extra dimension coordinate as described in Using the Extra Dimension Coordinates.
The desired selection for the node may correspond to boundaries with different layered materials. The All layered materials option allows to gather these materials to make the desired selection applicable for the node on the union of the boundaries where the layered materials are defined.
See Layered Material, Layered Material Link, Layered Material Stack, Layered Material Link (Subnode), and Single Layer Material in the COMSOL Multiphysics Reference Manual.
Temperature
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.
The equation for this condition is T = T0 where T0 is the prescribed temperature.
Constraint Settings
To display this section, click the Show button () and select Advanced Physics Options.
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.
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Thin Layer (Heat Transfer interface) and Solid (Heat Transfer in Shells interface)
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Thin Film (Heat Transfer interface) and Fluid (Heat Transfer in Shells interface)
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Fracture (Heat Transfer interface) and Porous Medium (Heat Transfer in Shells interface)
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Theory for Heat Transfer in Thin Structures
Shell Conduction: Application Library path Heat_Transfer_Module/Tutorials,_Thin_Structure/shell_conduction
Location in User Interface
Context menus
 Heat Transfer in Solids>Thin Layer>Temperature
Heat Transfer in Solids>Thin Film>Temperature
Heat Transfer in Porous Media>Fracture>Temperature
Heat Transfer in Shells>Temperature
Heat Transfer in Films>Temperature
Heat Transfer in Fractures>Temperature
Ribbon
Physics Tab with Thin Layer, Thin Film, or Fracture selected in the model tree:
Attributes>Temperature
Physics Tab with Heat Transfer in Shells selected in the model tree:
Egdes>Temperature