  A new method for the simulation of evolving multi-domains problems has been
introduced in a previous work (RealIMotion), Florez et al. (2020). In this
article further developments of the model will be presented. The main focus
here is a robust parallel implementation using a distributed-memory approach
with the Message Passing Interface (MPI) library OpenMPI. The original 2D
sequential methodology consists in a modified front-tracking approach where the
main originality is that not only interfaces between domains are discretized
but their interiors are also meshed. The interfaces are tracked based on the
topological degree of each node on the mesh and the remeshing and topological
changes of the domains are driven by selective local operations performed over
an element patch. The accuracy and the performance of the sequential method has
proven very promising in Florez et al. (2020). In this article a parallel
implementation will be discussed and tested in context of motion by curvature
flow for polycrystals, i.e. by considering Grain Growth (GG) mechanism. Results
of the performance of the model are given and comparisons with other approaches
in the literature are discussed.
