CFDEM: open source CFD, DEM and CFD-DEM. Particles and flow processes are everywhere - in industry, environment and everyday life Sugar, sand, ores, tablets, chemicals, biomass, detergents, plastics, crops, fruits need to be harvested, produced, processed, transported and stored. CFDEM®project is an open source software project for computational simulation engines, for these particle and fluid flow processes.Most notably, we develop the LIGGGHTS® and CFDEM®coupling simulation engines.