# PhasicFlow: src/phasicFlow/structuredData/boundaries -> boundaryBase Relation
PhasicFlow is an open-source parallel DEM (discrete element method) package for simulating granular flow. It is developed in C++ and can be exectued on both GPU (like CUDA) and CPU.

### boundaries → boundaryBase Relation

File in src/phasicFlow/structuredData/boundaries | Includes file in src/phasicFlow/structuredData/boundaries/boundaryBase
--- | ---
boundaryList.hpp | boundaryBase.hpp
boundaryExit / boundaryExit.hpp | boundaryBase.hpp
boundaryNone / boundaryNone.hpp | boundaryBase.hpp
boundaryPeriodic / boundaryPeriodic.hpp | boundaryBase.hpp
boundaryReflective / boundaryReflective.hpp | boundaryBase.hpp