Tuesday, March 23

MS10
Radiation Transport via Discrete Ordinates

4:30 PM-6:30 PM
Room: Executive Salon 1

Radiation transport (photonic or particulate) is an important effect in simulations of combustion, stars, and nuclear reactors and weapons. The models are very expensive to compute, since they add 3 dimensions at every grid point (2 angular and 1 energy). They raise numerical analysis issues for gridding and discretization strategies, iterative versus direct solvers, and methods for accelerating convergence. Parallel computation poses additional challenges because of directional and long-range effects. The speakers in this minisymposium will discuss the discrete ordinates methods commonly used to solve the radiation equations, parallel strategies and successes, and challenges for the future.

Organizer: Steve Plimpton
Sandia National Laboratories, Albuquerque

4:30-4:55 Parallel Transport Computations by Spatial Decomposition

Marv Adams, Nancy Amato, Paul Nelson, and Lawrence Rauchwerger, Texas A&M University, College Station

5:00-5:25 Parallel S_n Methods for Orthogonal Grids

Randal S. Baker, Los Alamos National Laboratory

5:30-5:55 Parallel Iterative and Direct Methods for Transport Calculations on Unstructured Grids

Shawn P. Burns, Kent G. Budge, and Mark A. Christon, Sandia National Laboratories, Albuquerque

6:00-6:25 Parallel Solution Strategies for Deterministic Radiation Transport Calculations on Unstructured Spatial Grids

Paul Nowak and Michael Nemanic, Lawrence Livermore National Laboratory

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MMD, 2/3/99