Sandia National Laboratories
John N. Shadid is a distinguished member of the technical staff at Sandia National Laboratories in the Computational Science R&D Group. He received bachelor’s and master’s degrees in mechanical engineering and a master’s degree in mathematics from the University of Wisconsin-Milwaukee and his doctoral degree in mechanical engineering from the University of Minnesota. After graduation he joined Sandia National Laboratories as a senior member of the technical staff in the Parallel Computational Sciences Department and was named a distinguished member in 1999. At Sandia he has been lead principal investigator and co-PI on a number of large-scale computational science projects, including research and development of a parallel implicit transport/reaction simulation code, MPSalsa, and a parallel preconditioned Krylov solver library, Aztec. The Aztec library received an R&D 100 award in 1997. The MPSalsa simulation code has been honored twice as a Gordon Bell Prize finalist. His current research interests include high-performance computing; parallel algorithm development; numerical solution methods for multiple-time-scale nonlinear coupled PDEs; and the simulation of a wide range of complex transport/reaction systems that includes, most recently, magnetohydrodynamic (MHD) systems.
Luis Chacón is a member of the technical staff at Los Alamos National Laboratory. He obtained a master’s degree in industrial engineering from the Polytechnic University of Madrid in 1994, and master’s and doctoral degrees in nuclear engineering from the University of Illinois in 1998 and 2000, respectively. In 2000, he accepted a Director’s Postdoctoral Fellowship appointment in T-division at Los Alamos National Laboratory to research the application of Newton-Krylov methods to resistive MHD. During this appointment, he has made important contributions in the context of implicit, nonlinear algorithms for two-dimensional resistive and Hall incompressible MHD.
Roger Pawlowski is a senior member of the technical staff at Sandia National Laboratories. He obtained his doctoral degree in chemical engineering from the State University of New York-Buffalo in 2000. He has contributed to a variety of projects at Sandia, including the development of solvers for large-scale circuit networks, coupled circuit/device solvers, catalytic oxidation reactor design, MEMS reactor design, multi-phase aerosol modeling, combustion, and fundamental studies of stagnation flows. His current interests focus on developing robust finite element discretization techniques for MHD and reacting flow physics and algorithm development for nonlinear systems, bifurcation analysis, and multi-physics coupling.
Further reading:
J. N. Shadid, A. G. Salinger, R. P. Pawlowski, P. T. Lin,
G. L. Hennigan, R. S. Tuminaro, and
R. B. Lehoucq. Large-scale Stabilized FE
Computational Analysis of Nonlinear Steady State
Transport/Reaction Systems, CMAME. 195, 1846-1871 (2006).
D. A. Knoll, V. A. Mousseau, L. Chacón, J. Reisner.
Jacobian-free Newton-Krylov methods for the accurate time integration
of stiff wave systems, Journal of Scientific Computing.
25, no. 1, 213-230 (2005).
Contact:
John Shadid
jnshadi@sandia.gov
Luis Chacón
chacon@lanl.gov
Roger Pawlowski
rppawlo@sandia.gov
Practicum Coordinator:
Heath Hanshaw
hlhansh@sandia.gov
Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy’s National Nuclear Security Administration under Contract DE-AC04-94AL85000.
