Stability of hydrodynamical relativistic planar jets : II. Long-term nonlinear evolution
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Stability of hydrodynamical relativistic planar jets : II. Long-term nonlinear evolution

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Stability of hydrodynamical relativistic planar jets : II. Long-term nonlinear evolution

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dc.contributor.author Perucho Pla, Manuel
dc.contributor.author Marti Puig, Jose Maria
dc.contributor.author Hanasz, M.
dc.date.accessioned 2010-06-29T10:55:02Z
dc.date.available 2010-06-29T10:55:02Z
dc.date.issued 2004
dc.identifier.uri http://hdl.handle.net/10550/14001
dc.description.abstract In this paper we continue our study of the Kelvin-Helmholtz (KH) instability in relativistic planar jets following the long-term evolution of the numerical simulations which were introduced in Paper I. The models have been classified into four classes (I to IV) with regard to their evolution in the nonlinear phase, characterized by the process of jet/ambient mixing and momentum transfer. Models undergoing qualitatively different non-linear evolution are clearly grouped in well-separated regions in a jet Lorentz factor/jet-to-ambient enthalpy diagram. Jets with a low Lorentz factor and small enthalpy ratio are disrupted by a strong shock after saturation. Those with a large Lorentz factor and enthalpy ratio are unstable although the process of mixing and momentum exchange proceeds to a longer time scale due to a steady conversion of kinetic to internal energy in the jet. In these cases, the high value of the initial Lorentz seems to prevent transversal velocity from growing far enough to generate the strong shock that breaks the slower jets. Finally, jets with either high Lorentz factors and small enthalpy ratios or low Lorentz factors and large enthalpy ratios appear as the most stable. In the long term, all the models develop a distinct transversal structure (shear/transition layers) as a consequence of KH perturbation growth. The properties of these shear layers are analyzed in connection with the parameters of the original jet models. en
dc.language.iso en en
dc.relation http://www.aanda.org/articles/aa/pdf/2004/44/aa0350-04.pdf en
dc.source PERUCHO PLA, Manuel ; Marti Puig, Jose Maria ; Hanasz, M., 2004, Stability of hydrodynamical relativistic planar jets : II. Long-term nonlinear evolution, Astronomy and Astrophysics, vol. 427, no. 2, p. 431-444 en
dc.subject Galaxies ; Jets ; Hydrodynamics ; Instabilities en
dc.title Stability of hydrodynamical relativistic planar jets : II. Long-term nonlinear evolution en
dc.type info:eu-repo/semantics/article en
dc.type info:eu-repo/semantics/publishedVersion en
dc.subject.unesco UNESCO::ASTRONOMÍA Y ASTROFÍSICA en
dc.subject.unesco UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia en
dc.identifier.doi 10.1051/0004-6361:20040350 en
dc.description.private Perucho Pla, Manuel, Manel.Perucho@uv.es ; Marti Puig, Jose Maria, jose-maria.marti@uv.es en
dc.identifier.idgrec 016247 en

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