The interfaces for distributed ODEs and DAEs () — Domain ODEs and DAEs (dode), Boundary ODEs and DAEs (bode), Edge ODEs and DAEs (eode), and Point ODEs and DAEs (pode) — are found under the Mathematics>ODE and DAE Interfaces branch () when adding a physics interface. These interfaces provide the possibility to solve distributed ODEs and DAE in domains, on boundaries and edges, and at points.

When any of these interfaces are added, these default nodes are also added to the Model Builder: Distributed ODE and Initial Values. Then, from the Physics toolbar, add other nodes that implement, for example, other algebraic equations. You can also right-click the node to select features from the context menu.

The Label is the default physics interface name.

The Name is used primarily as a scope prefix for variables defined by the physics interface. Refer to such physics interface variables in expressions using the pattern <name>.<variable_name>. In order to distinguish between variables belonging to different 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 ODEs and DAEs interface in the model) is dode (in domains), bode (on boundaries), eode (on edges), or pode (at points).