# PhasicFlow: Class Members - Typedefs
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.

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- GeometryMotionModel : boundaryGrainInteraction< contactForceModel, geometryMotionModel > , boundarySphereInteraction< contactForceModel, geometryMotionModel > , grainInteraction< contactForceModel, geometryMotionModel, contactListType > , periodicBoundaryGrainInteraction< contactForceModel, geometryMotionModel > , periodicBoundarySphereInteraction< contactForceModel, geometryMotionModel > , sphereInteraction< contactForceModel, geometryMotionModel, contactListType >
- GeometryType : geometricRegion< GeomType > , PeakableRegion< GeomType >