Heat Flux (Heat Transfer in Shells Interface)
Use this node to add heat flux across boundaries of a shell. A positive heat flux adds heat to the domain. This feature adds a heat source (or sink) to edges. It adds a heat flux q = q0.
Edge Selection
Select the edges on which to apply the heat flux. The Restrict to layered edges check box makes the node applicable only if a layered material is defined on the edge. 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 edge index (for example, slmat1), otherwise the edge is marked as not applicable.
Note that when the Shell type is Nonlayered shell in the Shells Properties section of the parent interface, the Restrict to layered boundaries check box is not editable.
In addition, in 2D, edges are modeled as points and this section is named Point Selection, containing a Restrict to layered points check box.
Shell Properties
Different settings are available, depending on the settings in the Shell Properties section of the parent interface:
When the Shell type is Layered shell in the Shells Properties section of the parent interface, the same layered material is used in the Heat Flux node, but you can limit the contribution to individually selected layers by clearing the Use all layers check box. For a given Layered Material Link or Layered Material Stack, you get access to a list of check boxes for the selection of the individual layers.
When the Shell type is Nonlayered shell in the Shells Properties section of the parent interface, the Thickness is From physics interface in the Heat Flux node. You can change to User defined and override the interface setting with a specific value or expression for Lth.
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.
Material Type
Select an option in the Material type list to specify if the inputs of the Heat Flux section are defined in the material or spatial frame:
The Solid option specifies that the heat flux q0 is defined in the material frame. Because the heat transfer variables and equations are defined in the spatial frame, the inputs are internally converted to the spatial frame. See Conversion Between Material and Spatial Frames for details.
The default option for the Heat Flux node is Nonsolid, which defines q0 in the spatial frame. No frame conversion is needed.
The From material option uses the option selected in the Material type list of the Material Properties section of the material applied on the domain on which the node is active.
Heat Flux
These settings are the same as for the Heat Flux (Thin Layer, Thin Film, Fracture) node available for the other interfaces.
In 2D, q = dzq0 to take into account the out-of-plane thickness.
Shell Conduction: Application Library path Heat_Transfer_Module/Tutorials,_Thin_Structure/shell_conduction
Location in User Interface
Context Menus
Ribbon
Physics tab with Heat Transfer in Shells selected: