The Particle Tracing Module contains predefined multiphysics interfaces to facilitate easy setup of models with the most commonly occurring settings. This chapter describes the multiphysics interfaces that are available with the Particle Tracing Module. Two of these multiphysics interfaces can be found under the AC/DC branch () when adding a physics interface — Particle Field Interaction, Nonrelativistic and Particle Field Interaction, Relativistic. The Fluid Particle Interaction interface is found under the Fluid Flow branch ().

See The Electromagnetics Interfaces in the COMSOL Multiphysics Reference Manual for other AC/DC interface and feature node settings.