On the Performance of an Overlapping-Domain Parallelization Strategy for Eulerian-Lagrangian Multiphysics Software

In this work, a strategy for the parallelization of a two-way CFD-DEM coupling is investigated. It consists on adopting balanced overlapping partitions for the CFD and the DEM domains, that aims to reduce the memory consumption and inter-process communication between CFD and DEM. Two benchmarks are proposed to assess the consistency and scalability of this approach. coupled execution on 252 cores shows that less than 1% of time is used to perform inter-physics data exchange.