We use two large simulations, the chemical reaction dynamics of H + H 2  and the collision of two galaxies to show that current parallel machines are capable of large supercomputer level calculations. We contrast the different architectural tradeoffs for these problems and draw some implications for future production parallel supercomputers.
['Geoffrey C. Fox', 'Paul G. Hipes', 'John K. Salmon']
Practical parallel supercomputing: examples from chemistry and physics