Nonlinear evolution of the magnetized Kelvin-Helmholtz instability: From fluid to kinetic modeling

0421218 - ASÚ 2014 RIV US eng J - Článek v odborném periodiku
Henri, P. - Cerri, S.S. - Califano, F. - Pegoraro, F. - Rossi, C. - Faganello, M. - Šebek, Ondřej - Trávníček, Pavel M. - Hellinger, Petr - Frederiksen, J. T. - Nordlund, A. - Markidis, S. - Keppens, R. - Lapenta, G.
Nonlinear evolution of the magnetized Kelvin-Helmholtz instability: From fluid to kinetic modeling.
Physics of Plasmas. Roč. 20, č. 10 (2013), 102118/1-102118/13. ISSN 1070-664X. E-ISSN 1089-7674
Grant CEP: GA MŠMT(CZ) 7E11053
GRANT EU: European Commission(XE) 263340 - SWIFF
Grant ostatní: European Commission(XE) HPC-EUROPA2 - No. 228398; EU(XE) RI-283493; NASA(US) NNX11A1164G
Institucionální podpora: RVO:67985815
Klíčová slova: Kelvin-Helmholtz instability * plasma kinetic theory * plasma magnetohydrodynamics
Kód oboru RIV: BN - Astronomie a nebeská mechanika, astrofyzika
Impakt faktor: 2.249, rok: 2013

We report here the first comparative study of the evolution of a magnetized shear flow, through a variety of different plasma models by using magnetohydrodynamic (MHD), Hall-MHD, two-fluid, hybrid kinetic, and full kinetic codes. Kinetic relaxation effects are discussed to emphasize the need for kinetic equilibriums to study the dynamics of collisionless plasmas in non trivial configurations. Discrepancies between models are studied both in the linear and in the nonlinear regime of the magnetized Kelvin-Helmholtz instability, to highlight the effects of small scale processes on the nonlinear evolution of collisionless plasmas. We illustrate how the evolution of a magnetized shear flow depends on the relative orientation of the fluid vorticity with respect to the magnetic field direction during the linear evolution when kinetic effects are taken into account.
Trvalý link: http://hdl.handle.net/11104/0227622