Acknowledgments

Research at the University of Oregon is sponsored by contracts (DE-FG02-05ER25663, DE-FG02-05ER25680) from the MICS program of the U.S. Dept. of Energy, Office of Science. We wish to thank Aytekin Gel of Aeolus Research and NETL for his work on the MFIX application, and the Pittsburgh Supercomputing Center for providing us access to the Cray XT3 system.