Dear all,rnrnI am using cavity2d MPI as my experiment example, and it works well. But i am wondering how the MPI is implemented on Cavity2d in OpenLB. For example If i want to modify the mpi code, where can i do this? Which data is sent or receive by mpi (how mpi works on cavity2d)?rnrnI really appreciate any helps or comments.rnrnThank you very much 🙂