Towards fast parallel CFD-DEM: An Open-Source Perspective
Sprache des Titels:
Open Source CFD International Conference, Barcelona
We report on the synthesis of the Discrete Element Method (DEM) modelling
the behaviour of granular materials and a finite volume model for the
continuous interstitial fluid using Computational Fluid Dynamics (CFD).
In earlier publications, the authors presented a similar coupling approach
for the commercial software packages EDEM and FLUENT along with experimental
validation. They could show the feasibility of a modelling approach
comprising the effect of (a) volume displacement by the particles, (b) drag
of the fluid on the particles as well as (c) Magnus force due to particle
rotation. With that approach, a wide range of coupled particle-fluid systems
can be handled. Yet, due to shortcomings of the commercial software packages
this approach is limited to shared memory machines.
As real industrial problems are often characterized by high computational
effort, the need for a DEM-CFD solver able to run on large clusters is
obvious. To take a first step into this direction, the authors developed a
coupled solver (“LammpsFoam”) joining the two software packages LAMMPS and
OpenFOAM. While the former covers the DEM modelling, the latter describes
the fluid dynamics of the continuous phase. The implementation of the code
permits fully parallel simulations on distributed memory machines using MPI
This paper is organized as follows: First, the modelling strategy is
outlined. Secondly, a simple validation test case for the “LammpsFoam”
solver is discussed before finally an outlook on future work is given.