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Kelvin-Helmholtz versus Hall Magneto-shear instability in astrophysical flows
- Source :
- Phys. Rev. E 89, 053105 (2014)
- Publication Year :
- 2014
-
Abstract
- 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 magneto-shear instability can take place. We performed three-dimensional simulations of the Hall-MHD 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 magneto-shear instability is not only non-negligible, but it actually displays growth rates larger than those of the Kelvin-Helmholtz instability.
- Subjects :
- Astrophysics - High Energy Astrophysical Phenomena
Physics - Plasma Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. E 89, 053105 (2014)
- Publication Type :
- Report
- Accession number :
- edsarx.1405.6220
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevE.89.053105