TY - GEN
T1 - Optimization of Full-Core Reactor Simulations on Summit
AU - Min, Misun
AU - Lan, Yu Hsiang
AU - Fischer, Paul
AU - Merzari, Elia
AU - Kerkemeier, Stefan
AU - Phillips, Malachi
AU - Rathnayake, Thilina
AU - Novak, April
AU - Gaston, Derek
AU - Chalmers, Noel
AU - Warburton, Tim
N1 - Publisher Copyright:
© 2022 IEEE.
PY - 2022
Y1 - 2022
N2 - Nek5000/RS, a highly-performant open-source spectral element code, has recently achieved an unprecedented milestone in the simulation of nuclear reactors: the first full core computational fluid dynamics simulations of reactor cores, including pebble beds with 352,625 pebbles and 98M spectral elements (51 billion gridpoints), advanced in less than 0.25 seconds per Navier-Stokes timestep. The authors present performance and optimization considerations necessary to achieve this milestone when running on all of Summit. These optimizations led to a fourfold reduction in time-to-solution, making it possible to perform high-fidelity simulations of a single flow-through time in less than six hours for a full reactor core under prototypical conditions.
AB - Nek5000/RS, a highly-performant open-source spectral element code, has recently achieved an unprecedented milestone in the simulation of nuclear reactors: the first full core computational fluid dynamics simulations of reactor cores, including pebble beds with 352,625 pebbles and 98M spectral elements (51 billion gridpoints), advanced in less than 0.25 seconds per Navier-Stokes timestep. The authors present performance and optimization considerations necessary to achieve this milestone when running on all of Summit. These optimizations led to a fourfold reduction in time-to-solution, making it possible to perform high-fidelity simulations of a single flow-through time in less than six hours for a full reactor core under prototypical conditions.
UR - http://www.scopus.com/inward/record.url?scp=85149298041&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85149298041&partnerID=8YFLogxK
U2 - 10.1109/SC41404.2022.00079
DO - 10.1109/SC41404.2022.00079
M3 - Conference contribution
AN - SCOPUS:85149298041
T3 - International Conference for High Performance Computing, Networking, Storage and Analysis, SC
BT - Proceedings of SC 2022
PB - IEEE Computer Society
T2 - 2022 International Conference for High Performance Computing, Networking, Storage and Analysis, SC 2022
Y2 - 13 November 2022 through 18 November 2022
ER -