Friday, July 17

MS63
Numerical Algorithms in Air Quality Modeling

10:30 AM-12:30 PM
Room: Sidney Smith 2127

Numerical air quality modeling primarily deals with the approximate solution of photochemical dispersion models. These models are used to enhance the understanding of the chemical composition of the atmosphere and, in particular, the relation between anthropogenic emissions and the resulting distributions of primary and secondary polluting species. At the heart of such models lie systems of time-dependent, three-space dimensional PDEs describing advective transport, turbulent diffusive transport, many (photo)chemical reactions, emissions and depositions. Each single species introduces a PDE and modern models that easily contain more than a 100 species. Numerical solutions involve advection schemes, stiff ODE solvers, operator splitting, adaptive grids and, of course, high-performance computing and parallelism. The speakers in this minisymposium will present recent research results, focusing on algorithmic issues.

10:30 Atmospheric Chemistry Applications to Parallel Computers

Douglas A. Rotman, Lawrence Livermore National Laboratory

11:00 Analysis of Operator Splitting for Advection-Diffusion-Reaction Problems

Debby Lanser, Center for Mathematics and Computer Science (CWI), The Netherlands; and Jan Verwer, Organizer

11:30 Numerical Modeling of Atmospheric Dispersion Problems on Unstructured Spatial Meshes

Martin Berzins, A. Tomlin, G. Hart, X. Y. Luo and J. M. Ware, University of Leeds, United Kingdom

12:00 Reducing Procedures for Chemical Kinetics

Bruno Sportisse and Rafik Djouad, CERMICS, Ecole Nationale des Ponts et Chaussees, France