thanks for the interest and thought, I feel that it must be possible, though the computer might have to be left for a couple of hours to work through the calculations. The key is that I know the particle interactions can reflect natural Newtonian interaction and can be set to zero friction so they don't run out of energy. There may be small errors in the calculations which build chaotically into unexpected results, but I feel that they should counteract each other in general and not pose a significant problem at this stage.