Drift Instabilities in Thin Current Sheets Using a Two-Fluid Model With Pressure Tensor Effects

Jonathan Ng, Ammar Hakim, J. Juno, Amitava Bhattacharjee

Research output: Contribution to journalArticle

Abstract

The integration of kinetic effects in fluid models is important for global simulations of the Earth's magnetosphere. We use a two-fluid 10-moment model, which includes the pressure tensor and has been used to study reconnection, to study the drift kink and lower hybrid drift instabilities. Using a nonlocal linear eigenmode analysis, we find that for the kink mode, the 10-moment model shows good agreement with kinetic calculations with the same closure model used in reconnection simulations, while the electromagnetic and electrostatic lower hybrid instabilities require modeling the effects of the ion resonance using a Landau fluid closure. Comparisons with kinetic simulations and the implications of the results for global magnetospheric simulations are discussed.

Original languageEnglish (US)
Pages (from-to)3331-3346
Number of pages16
JournalJournal of Geophysical Research: Space Physics
Volume124
Issue number5
DOIs
StatePublished - May 1 2019

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two fluid models
current sheets
Tensors
tensors
Fluids
fluid
kinetics
closures
Kinetics
simulation
fluids
moments
Magnetosphere
Earth magnetosphere
magnetosphere
Electrostatics
Earth (planet)
Ions
electrostatics
electromagnetism

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

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Drift Instabilities in Thin Current Sheets Using a Two-Fluid Model With Pressure Tensor Effects. / Ng, Jonathan; Hakim, Ammar; Juno, J.; Bhattacharjee, Amitava.

In: Journal of Geophysical Research: Space Physics, Vol. 124, No. 5, 01.05.2019, p. 3331-3346.

Research output: Contribution to journalArticle

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