Résumé
Large granular dynamical systems simulation requires the help of parallel computations. Domain decomposition methods (DDM), classically used for continuum media is extended herein to a discrete element model. Parallelization of the LMGC90 code, developed in LMGC, for a parallel distributed memory environment is of interest to the application to railway track ballast, at SNCF. Here, we focus on two different versions of a DDM, within the framework of LMGC90 code.