The Fluid–Pipe Interaction, Fixed Geometry () interface can be used to model problems where the forces from the fluid in a piping system act as structural loads. The structural deformations do not affect the flow.

You add a predefined Fluid–Pipe Interaction, Fixed Geometry interface from the Fluid–Structure Interaction () group in either the Structural Mechanics branch () or the Fluid Flow branch () of the Model Wizard or Add Physics windows. Pipe Flow and Pipe Mechanics interfaces are then added to the Model Builder.

In addition, the Multiphysics node is added, which automatically includes the multiphysics coupling node Fluid–Pipe Interaction.