1. Department of Mechanical Engineering, University of Michigan, G.G. Brown Laboratory, 2350 Hayward, Ann Arbor, MI 48109 e-mail:
2. Department of Chemical Engineering, University of Michigan, 3074 H.H. Dow 2300, Hayward Street, Ann Arbor, MI 48109-2136 e-mail:
3. Department of Mechanical Engineering, University of Michigan, 1231 Beal Avenue, 1012 Lay Autolab, Ann Arbor, MI 48109 e-mail:
4. Department of Chemical Engineering, University of Michigan, 3170 H.H. Dow 2300, Hayward Street, Ann Arbor, MI 48109-2136 e-mail:
5. Ford Motor Company, 2101 Village Road, Dearborn, MI 48124 e-mail: