Seminars & Events

Mathematics and Computer Science Division
"Numerical Algorithms for Petascale Sciencet"

DATE: June 27, 2008
TIME: 9:30 am
SPEAKER: Paul Fischer, Computational Scientist
LOCATION: Building 221 Conference Room A216, Argonne National Laboratory

Description:
In many science areas, the quest for increased computational resources is driven by a need to span a broader range of scales, that is, to capture the interaction of small scales with the large. In transport problems such as
electromagnetics and fluid mechanics, this implies a need to propagate small scale features over long times and distances. In numerical simulations, such long-time integrations are most efficiently realized by using high-order discretizations. Here, we present recent advances in spectral element methods designed for the petascale architectures featuring > 100,000 processors, such as those that will soon be deployed by DOE and NSF. In particular, we address stable high-order methods, multilevel iterative solvers, and implementation issues for efficient single- and multi-node performance. Application areas include the study of magnetorotational turbulence in accretion disk models, heat transfer in advanced reactor designs, wakefield computations in accelerators, and transition to turbulence in vascular flows.

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