A tight-coupling scheme sharing minimum information across a spatial interface between gyrokinetic turbulence codes
Abstract
A new scheme that tightly couples kinetic turbulence codes across a spatial interface is introduced. This scheme evolves from considerations of competing strategies and down-selection. It is found that the use of a composite kinetic distribution function and fields with global boundary conditions as if the coupled code were one makes the coupling problem tractable. In contrast, coupling the two solutions from each code across the overlap region is found to be more difficult due to numerical dephasing of the turbulent solutions between two solvers. Another advantage of the new scheme is that the data movement can be limited to the 3D fluid quantities, instead of higher dimensional kinetic information, which is computationally more efficient for large scale simulations on leadership class computers.
- Authors:
-
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Computer Science and Mathematics Division
- Univ. of Colorado, Boulder, CO (United States). Center for Integrated Plasma Studies, Dept. of Physics
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
- OSTI Identifier:
- 1463317
- Alternate Identifier(s):
- OSTI ID: 1468017
- Grant/Contract Number:
- AC02-09CH11466; AC02-05CH11231; AC05-00OR22725
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 25; Journal Issue: 7; Journal ID: ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
Dominski, Julien, Ku, Seung-Hoe, Chang, C. -S., Choi, Jong Youl, Suchyta, Eric D., Parker, S., Klasky, Scott A., and Bhattacharjee, Amitava. A tight-coupling scheme sharing minimum information across a spatial interface between gyrokinetic turbulence codes. United States: N. p., 2018.
Web. doi:10.1063/1.5044707.
Dominski, Julien, Ku, Seung-Hoe, Chang, C. -S., Choi, Jong Youl, Suchyta, Eric D., Parker, S., Klasky, Scott A., & Bhattacharjee, Amitava. A tight-coupling scheme sharing minimum information across a spatial interface between gyrokinetic turbulence codes. United States. https://doi.org/10.1063/1.5044707
Dominski, Julien, Ku, Seung-Hoe, Chang, C. -S., Choi, Jong Youl, Suchyta, Eric D., Parker, S., Klasky, Scott A., and Bhattacharjee, Amitava. Thu .
"A tight-coupling scheme sharing minimum information across a spatial interface between gyrokinetic turbulence codes". United States. https://doi.org/10.1063/1.5044707. https://www.osti.gov/servlets/purl/1463317.
@article{osti_1463317,
title = {A tight-coupling scheme sharing minimum information across a spatial interface between gyrokinetic turbulence codes},
author = {Dominski, Julien and Ku, Seung-Hoe and Chang, C. -S. and Choi, Jong Youl and Suchyta, Eric D. and Parker, S. and Klasky, Scott A. and Bhattacharjee, Amitava},
abstractNote = {A new scheme that tightly couples kinetic turbulence codes across a spatial interface is introduced. This scheme evolves from considerations of competing strategies and down-selection. It is found that the use of a composite kinetic distribution function and fields with global boundary conditions as if the coupled code were one makes the coupling problem tractable. In contrast, coupling the two solutions from each code across the overlap region is found to be more difficult due to numerical dephasing of the turbulent solutions between two solvers. Another advantage of the new scheme is that the data movement can be limited to the 3D fluid quantities, instead of higher dimensional kinetic information, which is computationally more efficient for large scale simulations on leadership class computers.},
doi = {10.1063/1.5044707},
journal = {Physics of Plasmas},
number = 7,
volume = 25,
place = {United States},
year = {Thu Jul 26 00:00:00 EDT 2018},
month = {Thu Jul 26 00:00:00 EDT 2018}
}
Web of Science
Figures / Tables:
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Works referencing / citing this record:
Exascale applications: skin in the game
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Figures / Tables found in this record: