An Extended MHD Study of the 16 October 2015 MMS Diffusion Region Crossing
Abstract
The Magnetospheric Multiscale (MMS) mission has given us unprecedented access to high cadence particle and field data of magnetic reconnection at Earth's magnetopause. MMS first passed very near an X-line on 16 October 2015, the Burch event, and has since observed multiple X-line crossings. Subsequent 3-D particle-in-cell (PIC) modeling efforts of and comparison with the Burch event have revealed a host of novel physical insights concerning magnetic reconnection, turbulence-induced particle mixing, and secondary instabilities. In this study, we employ the Gkeyll simulation framework to study the Burch event with different classes of extended, multifluid magnetohydrodynamics (MHD), including models that incorporate important kinetic effects, such as the electron pressure tensor, with physics-based closure relations designed to capture linear Landau damping. Such fluid modeling approaches are able to capture different levels of kinetic physics in global simulations and are generally less costly than fully kinetic PIC. Herein we focus on the additional physics one can capture with increasing levels of fluid closure refinement via comparison with MMS data and existing PIC simulations. In particular, we find that the ten-moment model well captures the agyrotropic structure of the pressure tensor in the vicinity of the X-line and the magnitude of anisotropic electron heatingmore »
- Authors:
-
- Princeton Univ., NJ (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Princeton Univ., NJ (United States); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Univ. of Maryland, College Park, MD (United States)
- Univ. of Maryland, College Park, MD (United States)
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR); National Science Foundation (NSF)
- OSTI Identifier:
- 1597982
- Grant/Contract Number:
- AC02‐05CH11231; AGS‐1338944; AGS‐162230
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Journal of Geophysical Research. Space Physics
- Additional Journal Information:
- Journal Volume: 124; Journal Issue: 11; Journal ID: ISSN 2169-9380
- Publisher:
- American Geophysical Union
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; reconnection; extended MHD; turbulence; numerical modeling
Citation Formats
TenBarge, J. M., Ng, J., Juno, J., Wang, L., Hakim, A. H., and Bhattacharjee, A. An Extended MHD Study of the 16 October 2015 MMS Diffusion Region Crossing. United States: N. p., 2019.
Web. doi:10.1029/2019JA026731.
TenBarge, J. M., Ng, J., Juno, J., Wang, L., Hakim, A. H., & Bhattacharjee, A. An Extended MHD Study of the 16 October 2015 MMS Diffusion Region Crossing. United States. https://doi.org/10.1029/2019JA026731
TenBarge, J. M., Ng, J., Juno, J., Wang, L., Hakim, A. H., and Bhattacharjee, A. Mon .
"An Extended MHD Study of the 16 October 2015 MMS Diffusion Region Crossing". United States. https://doi.org/10.1029/2019JA026731. https://www.osti.gov/servlets/purl/1597982.
@article{osti_1597982,
title = {An Extended MHD Study of the 16 October 2015 MMS Diffusion Region Crossing},
author = {TenBarge, J. M. and Ng, J. and Juno, J. and Wang, L. and Hakim, A. H. and Bhattacharjee, A.},
abstractNote = {The Magnetospheric Multiscale (MMS) mission has given us unprecedented access to high cadence particle and field data of magnetic reconnection at Earth's magnetopause. MMS first passed very near an X-line on 16 October 2015, the Burch event, and has since observed multiple X-line crossings. Subsequent 3-D particle-in-cell (PIC) modeling efforts of and comparison with the Burch event have revealed a host of novel physical insights concerning magnetic reconnection, turbulence-induced particle mixing, and secondary instabilities. In this study, we employ the Gkeyll simulation framework to study the Burch event with different classes of extended, multifluid magnetohydrodynamics (MHD), including models that incorporate important kinetic effects, such as the electron pressure tensor, with physics-based closure relations designed to capture linear Landau damping. Such fluid modeling approaches are able to capture different levels of kinetic physics in global simulations and are generally less costly than fully kinetic PIC. Herein we focus on the additional physics one can capture with increasing levels of fluid closure refinement via comparison with MMS data and existing PIC simulations. In particular, we find that the ten-moment model well captures the agyrotropic structure of the pressure tensor in the vicinity of the X-line and the magnitude of anisotropic electron heating observed in MMS and PIC simulations. However, the ten-moment model is found to have difficulty resolving the lower hybrid drift instability, which plays a fundamental role in heating and mixing electrons in the current layer.},
doi = {10.1029/2019JA026731},
journal = {Journal of Geophysical Research. Space Physics},
number = 11,
volume = 124,
place = {United States},
year = {Mon Sep 09 00:00:00 EDT 2019},
month = {Mon Sep 09 00:00:00 EDT 2019}
}
Web of Science
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