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Fluid Models Are Probably Capable To Simulate Farley-Buneman Instabilities
  • Enrique Rojas Villalba,
  • Keaton Burns,
  • David Hysell
Enrique Rojas Villalba
Cornell University, Cornell University

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Keaton Burns
Massachusetts Institute of Technology, Massachusetts Institute of Technology
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David Hysell
Cornell University, Cornell University
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It is generally accepted that modeling Farley-Buneman instabilities require resolving ion Landau damping to reproduce experimentally observed nonlinear features. Particle in cell (PIC) simulations have been able to reproduce most of these, but at a computational cost that severely affects its scalability. This limitation hinders the study of non-local phenomena that require three dimensions or coupling with larger-scale processes. We argue that a form of the five-moment fluid system can recreate several aspects of Farley-Buneman dynamics such as density and phase speed saturation, wave turning, and heating. A comparison between the proposed fluid and a kinetic model shows good qualitative agreement.