The Flow Coupling multiphysics coupling () defines u and p variables in order to set the model inputs in a physics interface that defines convective transport. In addition, it provides all the fluids quantities that may be needed by the interface (for example, viscosity and turbulence parameters).

The Label is the default multiphysics coupling feature name.

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 fc1.

This section defines the physics involved in the multiphysics coupling. By default, the applicable physics interface is selected in the Source list to apply the Destination to its physics interface to establish the coupling.

You can also select None from either list to uncouple the node from a physics interface. If the physics interface is removed from the Model Builder — for example, Heat Transfer in Solids is deleted — then the Destination list defaults to None as there is nothing to couple to.