A software package for particle-based numerical modelling.

The software implements the Discrete Element Method (DEM), a widely used technique for modelling processes involving large deformations, granular flow and/or fragmentation.  ESyS-Particle is designed for execution on parallel supercomputers, clusters or multicore PCs running a Linux-based OS.  The C++ simulation engine implements spatial domain decomposition via the Message Passing Interface (MPI).  A Python wrapper API provides flexibility in the design of numerical models, specification of modelling parameters and contact logic, and analysis of simulation data.  ESyS-Particle has been utilised to simulate earthquake nucleation, comminution in shear cells, silo flow, rock fragmentation, and fault gouge evolution, to name but a few applications.