Simulations of anti-parallel reconnection using a nonlocal heat flux closure
| dc.contributor.author | Ng, Jonathan | |
| dc.contributor.author | Hakim, Ammar | |
| dc.contributor.author | Bhattacharjee, A. | |
| dc.contributor.author | Stanier, Adam | |
| dc.contributor.author | Daughton, W. | |
| dc.date.accessioned | 2021-07-27T14:29:32Z | |
| dc.date.available | 2021-07-27T14:29:32Z | |
| dc.date.issued | 2017-08-08 | |
| dc.description.abstract | 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. The closure is tested using the island coalescence problem, which is sensitive to ion dynamics. We 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. | en_US |
| dc.description.sponsorship | This work was supported by NSF Grant Nos. AGS0962698 and AGS-1338944, DOE Contract No. DE-AC02- 09CH11466 and NASA Grant No. NNH13AW51I. This research used resources of the National Energy Research Scientific Computing Center, a DOE Office of Science User Facility supported by the Office of Science of the U.S. Department of Energy under Contract No. DE-AC02- 05CH11231 and Trillian, a Cray XE6m-200 supercomputer at the UNH supported by the NSF MRI program under Grant No. PHY-1229408. We thank G. Hammett for fruitful discussions. | en_US |
| dc.description.uri | https://aip.scitation.org/doi/10.1063/1.4993195 | en_US |
| dc.format.extent | 6 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m2u4eh-slv7 | |
| dc.identifier.citation | Ng, Jonathan et al.; Simulations of anti-parallel reconnection using a nonlocal heat flux closure; Physics of Plasmas 24, 082112, 8 August, 2017; https://doi.org/10.1063/1.4993195 | en_US |
| dc.identifier.uri | https://doi.org/10.1063/1.4993195 | |
| dc.identifier.uri | http://hdl.handle.net/11603/22146 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | AIP Publishing | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Goddard Planetary Heliophysics Institute (GPHI) | |
| dc.rights | This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. | |
| dc.rights | Public Domain Mark 1.0 | * |
| dc.rights | This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law. | |
| dc.rights.uri | http://creativecommons.org/publicdomain/mark/1.0/ | * |
| dc.title | Simulations of anti-parallel reconnection using a nonlocal heat flux closure | en_US |
| dc.type | Text | en_US |