This user’s guide describes the Granular Flow Module, an optional add-on package for COMSOL Multiphysics® designed to compute grain trajectories. The grains can interact with each other and with boundaries, and their motion can be affected by external fields, which can be user defined or solved for by other physics interfaces.

The Granular Flow Module User’s Guide introduces the modeling stages in COMSOL Multiphysics® and this module and serves as a reference for more advanced modeling techniques and details about the physics interfaces.