Temperature, interface (Heat Transfer in Shells Interface)
Use this node to specify the temperature on the exterior interfaces of a shell and, for the case of a layered shell, at the interfaces between its layers.
Interface Selection
Set the interfaces for which the temperature should be prescribed. These can be internal interfaces between layers or the top and bottom surfaces. Select the applicable layers (the default setting is All layered materials) in the Layered Material list. 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 Layer Selection setting).
For a Single Layer Material, the temperature is prescribed on both sides by default. Unselect the Downside and Upside check boxes for another behavior. This setting has no effect unless the temperature differs from one side of the boundary to the other.
When a layered material stack or link is selected from the Layered Material list, unselect the check boxes corresponding to layer interfaces where the node should not be applied in the Selection table.
You can visualize the selected interfaces 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.
Location in User Interface
Context menus
Heat Transfer in Shells>Interfaces>Temperature, Interface
Heat Transfer in Films>Interfaces>Temperature, Interface
Heat Transfer in Fractures>Interfaces>Temperature, Interface
Ribbon
Physics Tab with Heat Transfer in Shells selected in the model tree:
Boundaries>Temperature, Interface