fix ID group-ID couple/cfd couple_every N mpi
- ID, group-ID are documented in fix command
- couple/cfd = style name of this fix command
- couple_every = obligatory keyword
- N = number of DEM time steps between two coupling steps
fix cfd all couple/cfd couple_every 1000 mpi
This fix is responsible for the coupling between CFD and DEM calculation, i.e. for pushing and pulling of properties.