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https://doi.org/10.5194/egusphere-2022-1264
https://doi.org/10.5194/egusphere-2022-1264
01 Dec 2022
 | 01 Dec 2022

Fluid Models Capturing Farley-Buneman Instabilities

Enrique Rojas, Keaton Burns, and David Hysell

Abstract. It is generally accepted that modeling Farley-Buneman instabilities require resolving ion Landau damping to reproduce experimentally observed features. Particle-in-cell (PIC) simulations have been able to reproduce most of these, but at a computational cost that severely affects their 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 qualitative aspects of Farley-Buneman dynamics such as density and phase speed saturation, wave turning, and heating. Unexpectedly, these features are still reproduced even without using artificial viscosity to capture Landau damping. Comparing the proposed fluid models and a PIC implementation shows good qualitative agreement.

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Journal article(s) based on this preprint

13 Jul 2023
Fluid models capturing Farley–Buneman instabilities
Enrique L. Rojas, Keaton J. Burns, and David L. Hysell
Ann. Geophys., 41, 281–287, https://doi.org/10.5194/angeo-41-281-2023,https://doi.org/10.5194/angeo-41-281-2023, 2023
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The requested preprint has a corresponding peer-reviewed final revised paper. You are encouraged to refer to the final revised version.

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The standard linear fluid theory of Farley-Buneman predicts that kinetic physics is required to...
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