These nodes define the thermal conductivity and thermodynamics properties of a material located on internal or external boundaries. The
Thin Layer node is available under the Heat Transfer interface, while the
Solid node is available under the Heat Transfer in Shells interface.
For a manually added Solid node in the Heat Transfer in Shells interface, or for a
Thin Layer node in the Heat Transfer interface, select the
Restrict to layered boundaries check box to make the node applicable only if a layered material is defined on the boundary. If a layered material (
Material with
Layer thickness specified,
Single Layer Material,
Layered Material Link, or
Layered Material Stack) is available, its name is then displayed beside the boundary index (for example,
slmat1), otherwise the boundary is marked as not applicable.
The default Solid node of the Heat Transfer in Shells interface is applied on all boundaries where the Heat Transfer in Shells interface is applied, and neither the boundary selection nor the
Restrict to layered boundaries check box are editable.
Note that when the Shell type is
Nonlayered shell in the
Shells Properties section of the parent interface or node, the
Restrict to layered boundaries check box is not editable.
Different settings are available, depending on the settings in the Shell Properties section of the parent interface, and whether
Solid is the default node or was added manually:
This section is available when a temperature-dependent density defined in a material is used. On the material frame, the density is evaluated in relation to a reference temperature in order to ensure conservation of the mass in the presence of temperature variations. By default the Common model input is used. This corresponds to the variable
minput.Tempref, which is set to 293.15 K by default. To edit it, click the
Go to Source button (
), and in the
Default Model Inputs node under
Global Definitions, set a value for the
Volume reference temperature in the
Expression for remaining selection section.
The other options are User defined and all temperature variables from the physics interfaces included in the model.
This section is available when material properties are temperature-dependent. By default, the temperature of the parent interface is used and the section is not editable. To edit the Temperature field, click
Make All Model Inputs Editable (
). The available options are
User defined (default),
Common model input (the
minput.T variable, set to 293.15 K by default) and all temperature variables from the physics interfaces included in the model. To edit the
minput.T variable, click the
Go to Source button (
), and in the
Default Model Inputs node under
Global Definitions, set a value for the
Temperature in the
Expression for remaining selection section.
If the Layer type is
Thermally thin approximation, and the
Shell type is
Layered shell, the
Layerwise constant properties check box is available to solve the equations with weighted averaged material properties, assuming that these properties are constant within each layer. When suitable, this allows to compute efficiently the homogenized properties of the layered material. By default this check box is not selected, and the properties are integrated through the thickness of the layered material. It means that you can provide material parameters with a through-thickness variation by using expressions containing the extra dimension coordinate, as described in
Using the Extra Dimension Coordinates.
The default Thermal conductivity k is taken
From layered material. For
User defined select
Isotropic,
Diagonal,
Symmetric, or
Full to enter another value or expression.
By default the Density ρ and
Heat capacity at constant pressure Cp of the layer are taken
From layered material. See
Material Density in Features Defined in the Material Frame if a temperature-dependent density should be set. For
User defined enter other values or expressions.
When Layer type is
Thermally thick approximation, these properties are only used in time-dependent studies, but must be set in all cases.