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SCHEDULE: NOV 16-21, 2014
When viewing the Technical Program schedule, on the far righthand side is a column labeled "PLANNER." Use this planner to build your own schedule. Once you select an event and want to add it to your personal schedule, just click on the calendar icon of your choice (outlook calendar, ical calendar or google calendar) and that event will be stored there. As you select events in this manner, you will have your own schedule to guide you through the week.
Greater than 10x Acceleration of Fusion Plasma Edge Simulations Using the Parareal Algorithm
SESSION: Poster Reception
EVENT TYPE: Posters
TIME: 5:15PM - 7:00PM
AUTHOR(S):Debasmita Samaddar, David P. Coster, Xavier Bonnin, Christoph Bergmeister, Eva Havlickova, Wael R. Elwasif, Lee A. Berry, Donald B. Batchelor
ROOM:New Orleans Theater Lobby
ABSTRACT:
Simulations involving the edge of magnetically confined, fusion plasma are an extremely challenging task. The physics in this regime is particularly complex due to the presence of neutrals and the device wall. These simulations are extremely computationally intensive but are key to rapidly achieving thermonuclear breakeven on ITER-like machines. Space parallelization has hitherto been the most common approach to the best of our knowledge . Parallelizing time adds a new dimension to the parallelization thus significantly increasing computational speedup and resource utilization. This poster describes the application of the parareal algorithm to the edge-plasma code package – SOLPS. The algorithm requires a coarse (G) and a fine (F) solver – and optimizing G is a challenge. This work explores two approaches for G leading to computational gain >10 which is significant for simulations of this kind. It is also shown that an event-based approach to the algorithm greatly enhances performance.
Chair/Author Details:
Debasmita Samaddar - Culham Centre for Fusion Energy/UK Atomic Energy Authority
David P. Coster - Max Planck Institute of Plasma Physics
Xavier Bonnin - National Center for Scientific Research
Christoph Bergmeister - University of Innsbruck
Eva Havlickova - Culham Centre for Fusion Energy/UK Atomic Energy Authority
Wael R. Elwasif - Oak Ridge National Laboratory
Lee A. Berry - Oak Ridge National Laboratory
Donald B. Batchelor - Oak Ridge National Laboratory
Click here to download .ics calendar file
