Heat Transfer Analysis with Moving Frames
This section discusses heat transfer analysis with moving frames, when spatial and material frames do not coincide. In this case, the heat transfer interfaces account for deformation effects on heat transfer properties.
About Frames in the COMSOL Multiphysics Reference Manual
In the heat transfer interfaces, most of the features (equations and variables) are defined in the spatial frame, excluding Solid, Biological Tissue, Building Material, Shape Memory Alloy and Battery Layers features, which are defined on the material frame. When a moving mesh is detected, the user inputs for certain features are defined in the material frame and are converted so that all the corresponding variables contain the value in the spatial frame.
This subsection contains the list of all heat transfer nodes and the corresponding definition frame:
Physics Feature Nodes and Definition Frame
The following explains the different values listed in the definition frame column in Table 3-8, Table 3-9, and Table 3-10:
Material:
The inputs are entered by the user and defined in the material frame. Because the heat transfer postprocessing variables, and sometimes the equations, are defined in the spatial frame, the inputs are internally converted to the spatial frame.
Spatial:
The inputs are entered by the user and defined in the spatial frame. No conversion is done.
Material/(Spatial):
For these physics nodes, select from the Material type list to decide if the inputs are defined in the material or spatial frame. The default definition frame is the material frame, which corresponds to Solid in the Material type list.
(Material)/Spatial:
For these physics nodes, select from the Material type list to decide if the inputs are defined in the material or spatial frame. The default definition frame is the spatial frame, which corresponds to Nonsolid in the Material type list.
N/A:
There is no definition frame for this physics node.
Definition Frame of Domain Nodes
Definition Frame of Boundary Nodes
The definition frames of the corresponding pair features are identical to the ones of the standard features.
Definition Frame of Edge and Point Nodes