The Structure Thin-Film Flow Interaction (
) multiphysics node provides a coupling on a boundary between a thin fluid film and a solid material.
The Structure Thin-Film Flow Interaction node is only available with some COMSOL products (see
https://www.comsol.com/products/specifications/).
The Label is the multiphysics coupling feature name. The default
Label (for the first multiphysics coupling feature in the model) is
Structure Thin-Film Flow Interaction 1.
The Name is used primarily as a scope prefix for variables defined by the coupling node. Refer to such variables in expressions using the pattern
<name>.<variable_name>. In order to distinguish between variables belonging to different coupling nodes or physics interfaces, the
name string must be unique. Only letters, numbers, and underscores (_) are permitted in the
Name field. The first character must be a letter.
The default Name (for the first multiphysics coupling feature in the model) is
stfi1.
By default, the selection is set to All boundaries. However, only boundaries between fluid and solid domains are applicable. This is deduced automatically using the selections made on the coupled physics interfaces.
You can also select None from either list to uncouple the
Structure Thin-Film Flow Interaction node from a physics interface. If the physics interface is removed from the
Model Builder, for example
Solid Mechanics is deleted, then the
Structure list defaults to
None as there is nothing to couple to.