ESyS-Particle is a software package for particle-based numerical modelling. It 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 multi-core 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.
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Here are some key features of "ESyS-Particle":
· MPI parallel simulation engine
· Python API for simulation setup and execution
· scriptable setup of model geometry
· non-rotational and rotational spherical particles
· triangular meshes for specifying boundary conditions and walls
· scriptable visualisation of particle assemblies utilising POVray and VTK
· a variety of particle-particle and particle-wall interaction laws
· linear elastic repulsion between unbonded contacting particles
· linear elastic bonds between bonded particle-pairs
· both non-rotational and rotational frictional interactions between unbonded particles
· rotational bonds implementing torsion and bending stiffnesses in addition to normal and shear stiffnesses
· heat transfer via conduction between contacting particles
Requirements:
· Python
What's New in This Release: [ read full changelog ]
As v2.0 is a feature merge of two branches, many features belonging to either branch are now combined. These include:
· in-simulation geometry creation and visualisation tools (from the trunk)
· support for walls of arbitrary geometry via triangular mesh walls (from the trunk)
· post-processing tools (from the Dublin branch) particularly for analysis of fracturing and fragmentation, and interactive visualisation of simulation data using third party 3D visualisation tools (e.g. VisIt and paraview)
· more advanced support for reading complex geometries from files generated by a companion toolkit called LSMGenGeo (from the Dublin branch)
· checkpoint-restart facilities permitting terminated simulations to be restarted from a CheckpointRestart file (from the Dublin branch)
In addition to notable features from each branch, ESyS-Particle v2.0 also provides the following new features:
· improvements to the Python API documentation to increase usability
· a new implementation for rotational interactions that resolves a particle size-dependency of macroscopic properties for simulations involving particles with a range of radii
· additional tutorial documentation covering use of previously undocumented features as well as guides for navigating the ESyS-Particle python API documentation
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