Particles_getGlobalNum(integer(OUT) :: globalNumParticles)
Returns the global (total) number of particles in the simulation after computing it by calling an MPI reduction routine. Needed for input/output across all processors.
globalNumParticles : integer number of particles across all processors
The default implementation writes to the log file a line with the current global number of particles when first called, and then whenever the number has changed since the previous time.