Kelvin-Helmholtz versus Hall magnetoshear instability in astrophysical flows

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...

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Detalles Bibliográficos
Autores principales:	Gomez, Daniel Osvaldo, Bejarano, Cecilia Soledad, Mininni, Pablo Daniel
Publicado:	2014
Materias:	Magnetohydrodynamics Magnetoplasma Plasma stability Shear flow Astrophysical flows Comparative studies Ion-cyclotron frequency Ionized plasmas Kelvin-Helmholtz Kelvin-helmholtz instabilities Low-density plasmas Three dimensional simulations Plasma diagnostics
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15393755_v89_n5_p_Gomez http://hdl.handle.net/20.500.12110/paper_15393755_v89_n5_p_Gomez
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_15393755_v89_n5_p_Gomez
record_format	dspace
spelling	paper:paper_15393755_v89_n5_p_Gomez2023-06-08T16:21:00Z Kelvin-Helmholtz versus Hall magnetoshear instability in astrophysical flows Gomez, Daniel Osvaldo Bejarano, Cecilia Soledad Mininni, Pablo Daniel Magnetohydrodynamics Magnetoplasma Plasma stability Shear flow Astrophysical flows Comparative studies Ion-cyclotron frequency Ionized plasmas Kelvin-Helmholtz Kelvin-helmholtz instabilities Low-density plasmas Three dimensional simulations Plasma diagnostics 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. © 2014 American Physical Society. Fil:Gómez, D.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Bejarano, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mininni, P.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2014 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15393755_v89_n5_p_Gomez http://hdl.handle.net/20.500.12110/paper_15393755_v89_n5_p_Gomez
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Magnetohydrodynamics Magnetoplasma Plasma stability Shear flow Astrophysical flows Comparative studies Ion-cyclotron frequency Ionized plasmas Kelvin-Helmholtz Kelvin-helmholtz instabilities Low-density plasmas Three dimensional simulations Plasma diagnostics
spellingShingle	Magnetohydrodynamics Magnetoplasma Plasma stability Shear flow Astrophysical flows Comparative studies Ion-cyclotron frequency Ionized plasmas Kelvin-Helmholtz Kelvin-helmholtz instabilities Low-density plasmas Three dimensional simulations Plasma diagnostics Gomez, Daniel Osvaldo Bejarano, Cecilia Soledad Mininni, Pablo Daniel Kelvin-Helmholtz versus Hall magnetoshear instability in astrophysical flows
topic_facet	Magnetohydrodynamics Magnetoplasma Plasma stability Shear flow Astrophysical flows Comparative studies Ion-cyclotron frequency Ionized plasmas Kelvin-Helmholtz Kelvin-helmholtz instabilities Low-density plasmas Three dimensional simulations Plasma diagnostics
description	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. © 2014 American Physical Society.
author	Gomez, Daniel Osvaldo Bejarano, Cecilia Soledad Mininni, Pablo Daniel
author_facet	Gomez, Daniel Osvaldo Bejarano, Cecilia Soledad Mininni, Pablo Daniel
author_sort	Gomez, Daniel Osvaldo
title	Kelvin-Helmholtz versus Hall magnetoshear instability in astrophysical flows
title_short	Kelvin-Helmholtz versus Hall magnetoshear instability in astrophysical flows
title_full	Kelvin-Helmholtz versus Hall magnetoshear instability in astrophysical flows
title_fullStr	Kelvin-Helmholtz versus Hall magnetoshear instability in astrophysical flows
title_full_unstemmed	Kelvin-Helmholtz versus Hall magnetoshear instability in astrophysical flows
title_sort	kelvin-helmholtz versus hall magnetoshear instability in astrophysical flows
publishDate	2014
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15393755_v89_n5_p_Gomez http://hdl.handle.net/20.500.12110/paper_15393755_v89_n5_p_Gomez
work_keys_str_mv	AT gomezdanielosvaldo kelvinhelmholtzversushallmagnetoshearinstabilityinastrophysicalflows AT bejaranoceciliasoledad kelvinhelmholtzversushallmagnetoshearinstabilityinastrophysicalflows AT mininnipablodaniel kelvinhelmholtzversushallmagnetoshearinstabilityinastrophysicalflows
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Kelvin-Helmholtz versus Hall magnetoshear instability in astrophysical flows

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