I have re-meshed my geometry, I have 5 bodies as 1 part. The model is set up as 2-D axis-symmetric, mass-flow inlet and pressure outlet, running for 200,000 iterations, however, the convergence criterion is reached long before. Even with the updated mesh, the particle trajectories are behaving the same as before. I even tried, starting a new workbench file, in case my original had been corrupted in some way. At this point I have no idea what the problem is.