Simulations of anti-parallel reconnection using a nonlocal heat flux closure
- Princeton Plasma Physics Lab. (PPPL) and Princeton Univ., NJ (United States). Center for Heliophysics, Dept. of Astrophysical Sciences
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
The integration of kinetic effects in fluid models is important for global simulations of the Earth's magnetosphere. In particular, it has been shown that ion kinetics play a crucial role in the dynamics of large reconnecting systems, and that higher-order fluid moment models can account for some of these effects. Here, we use a ten-moment model for electrons and ions, which includes the off diagonal elements of the pressure tensor that are important for magnetic reconnection. Kinetic effects are recovered by using a nonlocal heat flux closure, which approximates linear Landau damping in the fluid framework. Moreover, the closure is tested using the island coalescence problem, which is sensitive to ion dynamics. We also demonstrate that the nonlocal closure is able to self-consistently reproduce the structure of the ion diffusion region, pressure tensor, and ion velocity without the need for fine-tuning of relaxation coefficients present in earlier models.
- Research Organization:
- Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Science Foundation (NSF)
- Grant/Contract Number:
- AGS-0962698; AGS-1338944; PHY-1229408; NNH13AW51I; AC02-05CH11231; AC02-09CH11466
- OSTI ID:
- 1398959
- Alternate ID(s):
- OSTI ID: 1374229
- Journal Information:
- Physics of Plasmas, Vol. 24, Issue 8; ISSN 1070-664X
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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