The Lorentz Force multiphysics coupling () maps the Lorentz Force contribution defined in the Magnetic Fields interface to the volume force defined in the Laminar Flow interface.

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 lf1.

This section defines the physics involved in the Lorentz Force multiphysics coupling. By default, the applicable physics interface is selected in the Electromagnetic list to apply the Fluid flow to its physics interface to establish the coupling.

You can also select None from either list to uncouple the Lorentz Force node from a physics interface. If the physics interface is removed from the Model Builder, for example Magnetic Fields is deleted, then the Electromagnetic list defaults to None as there is nothing to couple to.