Christoph Kloß, Georg Aichinger, Stefan Pirker,
"Multiscale Modelling of Particle Motion by Means of DEM and DPM"
: Proceedings of the symposium on Multi-scale Modelling for Industrial Flow Systems, CSIRO, Melbourne, Dec. 8-9, 2009
Multiscale Modelling of Particle Motion by Means of DEM and DPM
Sprache des Titels:
Proceedings of the symposium on Multi-scale Modelling for Industrial Flow Systems, CSIRO, Melbourne, Dec. 8-9
We report on the synthesis of the Discrete Element Method (DEM) modelling
the behaviour of individual grains and a Discrete Phase Model (DPM) for
disperse particle flow. Since in many cases different granular regimes occur
within one simulation, a synthesis of dedicated models operating at
different scales is considered to be the best trade-off between describing
the physics and ensuring computability. DEM captures the physics of granular
materials at the particle scale but is computationally time-consuming. We
show that complementing the DEM by a Discrete Phase Model (DPM) can
considerably accelerate the overall simulation. This is because the DPM
approach tracks the trajectory of groups (parcels) of particles. It neglects
interparticle collisions and is thus valid when the particle volume fraction
This DEM-DPM synthesis can also be complemented by the fluid dynamics of a
continuous phase, resulting in a fully coupled DEM-DPM-CFD approach.
We finally demonstrate the efficiency and validity of our approach by
applying our approach to a lab-scale particle charging experiment.