U.S. Department of EnergyOffice of Scientific and Technical Information
Multi-species collisions for delta-f gyrokinetic simulations: Implementation and verification with GENE
Abstract
A multi-species linearized collision operator based on the model developed by Sugama et al. has been implemented in the nonlinear gyrokinetic code, GENE. Such a model conserves particles, momentum, and energy to machine precision, and is shown to have negative definite free energy dissipation characteristics, satisfying Boltzmann’s H-theorem, including for realistic mass ratio. Finite Larmor Radius (FLR) effects have also been implemented into the local version of the code. For the global version of the code, the collision operator has been developed to allow for block-structured velocity space grids, allowing for computationally tractable collisional global simulations. The validity of the collision operator has been demonstrated by relaxation and conservation tests, as well as appropriate benchmarks. The newly implemented operator shall be used in future simulations to study magnetically confined fusion plasma turbulence and transport in more extreme regions with higher collisionality.
- Authors:
-
- OSTI
- Publication Date:
- DOE Contract Number:
- SC0016073
- Research Org.:
- Univ. of California, Los Angeles, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 97 MATHEMATICS AND COMPUTING
- OSTI Identifier:
- 1884726
- DOI:
- https://doi.org/10.7910/DVN/OQ2BSJ
Citation Formats
Crandall, P., Jarema, D., Doerk, H., Pan, Q., Merlo, G., Görler, T., Navarro, A. Bañón, Told, D., Maurer, M., and Jenko, F. Multi-species collisions for delta-f gyrokinetic simulations: Implementation and verification with GENE. United States: N. p., 2021.
Web. doi:10.7910/DVN/OQ2BSJ.
Crandall, P., Jarema, D., Doerk, H., Pan, Q., Merlo, G., Görler, T., Navarro, A. Bañón, Told, D., Maurer, M., & Jenko, F. Multi-species collisions for delta-f gyrokinetic simulations: Implementation and verification with GENE. United States. doi:https://doi.org/10.7910/DVN/OQ2BSJ
Crandall, P., Jarema, D., Doerk, H., Pan, Q., Merlo, G., Görler, T., Navarro, A. Bañón, Told, D., Maurer, M., and Jenko, F. 2021.
"Multi-species collisions for delta-f gyrokinetic simulations: Implementation and verification with GENE". United States. doi:https://doi.org/10.7910/DVN/OQ2BSJ. https://www.osti.gov/servlets/purl/1884726. Pub date:Sun Jun 27 00:00:00 EDT 2021
@article{osti_1884726,
title = {Multi-species collisions for delta-f gyrokinetic simulations: Implementation and verification with GENE},
author = {Crandall, P. and Jarema, D. and Doerk, H. and Pan, Q. and Merlo, G. and Görler, T. and Navarro, A. Bañón and Told, D. and Maurer, M. and Jenko, F.},
abstractNote = {A multi-species linearized collision operator based on the model developed by Sugama et al. has been implemented in the nonlinear gyrokinetic code, GENE. Such a model conserves particles, momentum, and energy to machine precision, and is shown to have negative definite free energy dissipation characteristics, satisfying Boltzmann’s H-theorem, including for realistic mass ratio. Finite Larmor Radius (FLR) effects have also been implemented into the local version of the code. For the global version of the code, the collision operator has been developed to allow for block-structured velocity space grids, allowing for computationally tractable collisional global simulations. The validity of the collision operator has been demonstrated by relaxation and conservation tests, as well as appropriate benchmarks. The newly implemented operator shall be used in future simulations to study magnetically confined fusion plasma turbulence and transport in more extreme regions with higher collisionality.},
doi = {10.7910/DVN/OQ2BSJ},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2021},
month = {6}
}