
Two Mathematicians from Department of Energy's Lawrence Berkeley National Laboratory Honored for Contributions to Computational Science and Engineering  
Jon Bashor, JBashor@lbl.gov, 5104865849  

BERKELEY — John B. Bell and Phillip Colella, applied mathematicians at the U.S. Department of Energy’s Lawrence Berkeley National Laboratory, have been named as corecipients of the 2003 SIAM/ACM Prize in Computational Science and Engineering, awarded by the Society for Industrial and Applied Mathematics (SIAM) and the Association for Computing Machinery (ACM). According to SIAM President Mac Hyman, the prize “is awarded in the area of computational science in recognition of outstanding contributions to the development and use of mathematical and computational tools and methods for the solution of science and engineering problems.” This is the first year the prize, which will be presented Tuesday, June 17, has been awarded. Algorithms developed by Bell, Colella and their research groups at Berkeley Lab are used for studying complex problems arising in fluid mechanics and computational physics. The methodology they have developed has been applied in such diverse areas as shock physics, turbulence, astrophysics, flow in porous media and combustion. Much of their research is funded through DOE’s Office of Science
and its Advanced Scientific Computing Research (ASCR) and Scientific Discovery
through Advanced Computing (SciDAC) programs. One of the current projects in the Center for Computational Sciences and Engineering led by Bell focuses on threedimensional simulations of turbulent methane combustion. The goal of these simulations is to model turbulencechemistry interactions to predict not only the basic energetics of the flame but also to quantify the detailed chemical behavior within the flame. Results of these simulations, to be presented at an international conference this summer, are the first fully resolved simulations of methane combustion with comprehensive chemistry for a laboratoryscale flame. In short, these computational simulations provide an unprecedented view of the detailed processes occuring in methane combustion. See http://seesar.lbl.gov/CCSE/Research/Combustion/Vflames.html for images from this computation and related work. The principal focus of Colella's current work is the development of new simulation software tools for multiscale problems in science and engineering. These tools are based on finitedifference methods on structured grids combined with blockstructured adaptive mesh refinement, and Cartesian grid embedded boundary methods for complex geometries. The target applications include nonideal magnetohydrodynamics problems arising in magnetic fusion; beam dynamics in accelerator design problems; simulation of gas jets in laserdriven plasmawakefield accelerators; multiphase flow in microgravity environments; geophysical and environmental fluid mechanics; and detailed spatial modeling of microbes (for a collection of simulation images from these and other applications of this software, go to http://davis.lbl.gov/APDEC/gallery/index.html). Much of this software is being developed as part of the Applied Differential Equations Integrated Software Infrastructure Center (APDEC) sponsored by DOE's SciDAC program. Colella is the project leader for APDEC and more information can be found at http://davis.lbl.gov/APDEC. He is also leading a NASA Earth and Space Sciences Computational Technologies project to develop algorithms and software for the simulation of multiphase flow and star formation (http://davis.lbl.gov/NASA/). “This recognition by their fellow applied mathematicians is is
highly merited and reflects John and Phil's sustained leadership and manifold
contributions to computational science and engineering,” said Alan
Laub, director of the SciDAC program. About the Recipients
John Bell received his B.S. (1975) degree from the Massachusetts Institute of Technology and his M.S. (1977) and Ph.D. (1979) degrees from Cornell University, all in mathematics. He is currently a Senior Staff Scientist and Group Leader for the Center for Computational Sciences and Engineering at Lawrence Berkeley National Laboratory. Prior to joining LBNL, he held positions at the Lawrence Livermore National Laboratory, Exxon Production Research and the Naval Surface Weapons Center. Bell’s research focuses on the development and analysis of numerical methods for partial differential equations arising in science and engineering. He has made contributions in the areas of finite difference methods, numerical methods for low mach number flows, adaptive mesh refinement, interface tracking and parallel computing. He has also worked on the application of these numerical methods to problems from a broad range of fields including combustion, shock physics, seismology, flow in porous media and astrophysics. His group’s Web page is at http://seesar.lbl.gov/ccse/index.html.
Phillip Colella received his A.B. (1974), M.A. (1976) and Ph..D. (1979) degrees from the University of California at Berkeley, all in applied mathematics. Has been a staff scientist at the Lawrence Berkeley National Laboratory and at the Lawrence Livermore National Laboratory, and from 1989 to 1995 was a Professor in the Mechanical Engineering Department at the University of California at Berkeley. He is currently a Senior Mathematician and Group Leader for the Applied Numerical Algorithms Group in the Computational Research Division at Lawrence Berkeley National Laboratory. His research has been in the area of numerical methods for partial differential equations, with contributions in highresolution finitedifference methods, adaptive mesh refinement, volumeoffluid methods for irregular boundaries, and programming language and library design for parallel scientific computing. He has also applied numerical methods in a variety of scientific and engineering fields, including shock dynamics, lowMach number and incompressible flows, combustion, porous media flows, and astrophysical flows. Colella’s group Web site is at http://seesar.lbl.gov/anag/. Berkeley Lab is a U.S. Department of Energy national laboratory located
in Berkeley, California. It conducts unclassified scientific research
and is managed by the University of California. Learn more at http://www.lbl.gov.

