The Part Libraries contain collections of geometry parts, which serve as extended geometric primitives or parameterized geometry sequences specially created for an application area. These parts are stored as
part models, which are COMSOL MPH files that contain only the following:
Some part libraries ship with the COMSOL products, but you can also add your own part libraries. In COMSOL Multiphysics, the Examples folder contains two parts:
bent_pipe, which is toroidal pipe with a wall, and
straight_pipe, which is a straight cylindrical pipe with a wall. The input parameters make it possible to create instances of these parts with a varying inner radius and wall thickness, for example.