TY - GEN
T1 - Fully-implicit ultrascale physics solvers and application to ion source modelling
AU - Beckwith, Kris
AU - Veitzer, Seth
AU - McCormick, Stephen F.
AU - Ruge, John W.
AU - Olson, Luke N.
AU - Cahoun, Jon C.
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2015/1/16
Y1 - 2015/1/16
N2 - Many problems of interest in plasma modelling are subject to the 'tyranny of scales', specifically, problems that encompass physical processes that operate on timescales that are separated by many orders of magnitude. Investigating such problems therefore requires the use of implicit time-integration schemes, which advance problem solutions on the timescale of interest, while incorporating the physics of the fast-timescales. One promising route to develop these implicit solvers is the combination of Jacobian-Free Newton- Krylov methods (JFNK, [1]), but adapting these methods to work in ultra scale computing environments is a formidable challenge. Here, we describe research on new approaches to adapt Algebraic Mulgrid based solvers (that can be used for provide efficient pre-conditioners for JFNK methods) to ultrascale computing environments, the development and testing of JFNK solvers for coupled plasma-electromagnetics within the USIM framework [2] and the application of these methods to modelling H- ion sources for the Spallation Neutron Source at ORNL.
AB - Many problems of interest in plasma modelling are subject to the 'tyranny of scales', specifically, problems that encompass physical processes that operate on timescales that are separated by many orders of magnitude. Investigating such problems therefore requires the use of implicit time-integration schemes, which advance problem solutions on the timescale of interest, while incorporating the physics of the fast-timescales. One promising route to develop these implicit solvers is the combination of Jacobian-Free Newton- Krylov methods (JFNK, [1]), but adapting these methods to work in ultra scale computing environments is a formidable challenge. Here, we describe research on new approaches to adapt Algebraic Mulgrid based solvers (that can be used for provide efficient pre-conditioners for JFNK methods) to ultrascale computing environments, the development and testing of JFNK solvers for coupled plasma-electromagnetics within the USIM framework [2] and the application of these methods to modelling H- ion sources for the Spallation Neutron Source at ORNL.
UR - http://www.scopus.com/inward/record.url?scp=84923007299&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84923007299&partnerID=8YFLogxK
U2 - 10.1109/PLASMA.2014.7012726
DO - 10.1109/PLASMA.2014.7012726
M3 - Conference contribution
AN - SCOPUS:84923007299
T3 - ICOPS/BEAMS 2014 - 41st IEEE International Conference on Plasma Science and the 20th International Conference on High-Power Particle Beams
BT - ICOPS/BEAMS 2014 - 41st IEEE International Conference on Plasma Science and the 20th International Conference on High-Power Particle Beams
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 41st IEEE International Conference on Plasma Science, ICOPS 2014 and the 20th IEEE International Conference on High-Power Particle Beams, BEAMS 2014
Y2 - 25 May 2014 through 29 May 2014
ER -