University of Texas at Austin

Past Event: Oden Institute Seminar

Massively parallel radiation transport simulations: current status and challenges ahead

Jean Ragusa , Texas A & M University

1 – 2PM
Friday Apr 28, 2017

POB 6.304

Abstract

In this talk, I will provide an overview of solution techniques and iterative techniques employed to solve the first-order form of the radiation transport equation on massively parallel machines. A review of scaling efficiency for transport sweeps (up to order 1-million processes) will be provided for logically Cartesian grids. Challenges posed by the need to move to unstructured (load-unbalanced) grids and ongoing research will be discussed. Diffusion-based synthetic accelerators for the one-speed (within-group) and multi group transport equations will be presented and issues related to massively parallel diffusion-accelerated transport sweeps be analyzed. Bio Dr. Jean Ragusa specializes in computational methods for radiation (neutron, photon, coupled electron-photon) transport, radiative transfer, and multiphysics applications (e.g., radiation-hydrodynamics and two-phase flow modeling using a seven-equation model). Dr. Ragusa obtained his PhD from the University of Grenoble in 2001 and was a visiting assistant professor in the scholar of nuclear engineering at Purdue in 2001. From 2002 until 2004, he was a research engineer at the CEA-Saclay, France, in the reactor physics and applied mathematics division. In September 2004, he joined Texas A&M University where he is a professor of Nuclear Engineering and, since 2009, the associate director of the Institute for Scientific Computation.

Event information

Date
1 – 2PM
Friday Apr 28, 2017
Location POB 6.304
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