Abstract
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.