期刊
PHYSICS OF PLASMAS
卷 23, 期 11, 页码 -出版社
AIP Publishing
DOI: 10.1063/1.4967276
关键词
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资金
- ITER-China Program [2015GB111003, 2014GB124005, 2013GB111000]
- JSPS-NRF-NSFC A3 Foresight Program in the field of Plasma Physics [NSFC-11261140328]
- National Science Foundation of China [11575186, 11575185, 11505185, 11505186]
- Chinese Scholar Council [201506340103]
- CAS Program for Interdisciplinary Collaboration Team
- Geo-Algorithmic Plasma Simulator (GAPS) project
- U.S. Dept. of Energy [DE-FG02-04ER-54742]
- Alexander von Humboldt Foundation
An explicit high-order noncanonical symplectic algorithm for ideal two-fluid systems is developed. The fluid is discretized as particles in the Lagrangian description, while the electromagnetic fields and internal energy are treated as discrete differential form fields on a fixed mesh. With the assistance of Whitney interpolating forms [H. Whitney, Geometric Integration Theory (Princeton University Press, 1957); M. Desbrun et al., Discrete Differential Geometry (Springer, 2008); J. Xiao et al., Phys. Plasmas 22, 112504 (2015)], this scheme preserves the gauge symmetry of the electromagnetic field, and the pressure field is naturally derived from the discrete internal energy. The whole system is solved using the Hamiltonian splitting method discovered by He et al. [Phys. Plasmas 22, 124503 (2015)], which was been successfully adopted in constructing symplectic particle-in-cell schemes [J. Xiao et al., Phys. Plasmas 22, 112504 (2015)]. Because of its structure preserving and explicit nature, this algorithm is especially suitable for large-scale simulations for physics problems that are multi-scale and require long-term fidelity and accuracy. The algorithm is verified via two tests: studies of the dispersion relation of waves in a two-fluid plasma system and the oscillating two-stream instability. Published by AIP Publishing.
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