Artículos de revistas
Kelvin-Helmholtz versus Hall magneto-shear instability in astrophysical flows
Gomez, Daniel Osvaldo; Bejarano, Cecilia Soledad; Mininni, Pablo Daniel; Kelvin-Helmholtz versus Hall magneto-shear instability in astrophysical flows; American Physical Society; Physical Review E: Statistical, Nonlinear And Soft Matter Physics; 89; 5; 5-2014; 5310501-5310507
Gomez, Daniel Osvaldo
Bejarano, Cecilia Soledad
Mininni, Pablo Daniel
We study the stability of shear flows in a fully ionized plasma. Kelvin-Helmholtz is a well-known macroscopic and ideal shear-driven instability. In sufficiently low-density plasmas, also the microscopic Hall magnetoshear instability can take place. We performed three-dimensional simulations of the Hall-magnetohydrodynamic equations where these two instabilities are present, and carried out a comparative study. We find that when the shear flow is so intense that its vorticity surpasses the ion-cyclotron frequency of the plasma, the Hall magnetoshear instability is not only non-negligible, but it actually displays growth rates larger than those of the Kelvin-Helmholtz instability.