The Piezoelectricity multiphysics coupling node () passes the appropriate relative permittivity from the Piezoelectric Material node in the Solid Mechanics interface (where it is specified together with the other material properties of the piezoelectric) to the Charge Conservation, Piezoelectric node in the Electrostatics interface. The Charge Conservation, Piezoelectric node implements the domain level electrostatics equations and does not require any user settings when it is coupled with the multiphysics coupling node.

The Label is the multiphysics coupling feature name. The default Label (for the first multiphysics coupling feature in the model) is Piezoelectricity 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 pze1.

The domain selection is locked so that all applicable domains are selected. Only domains that have both Charge Conservation, Piezoelectric selected in the Electrostatics interface and Piezoelectric Material selected in the Solid Mechanics interface are selected.

This section defines the physics involved in the Piezoelectricity multiphysics coupling. The Solid mechanics and Electrostatics lists include all applicable physics interfaces.

You can also select None from either list to uncouple the Piezoelectricity node from a physics interface. If the physics interface is removed from the Model Builder, for example Solid Mechanics is deleted, then the list defaults to None as there is nothing to couple to.