Recordatori. [SEMINARI] Rayleigh-Taylor and Richtmyer-Meshkov Instabilities in Relativistic Hydrodynamic Jets

[Enric Marco]

Title: Rayleigh-Taylor and Richtmyer-Meshkov Instabilities in
Relativistic Hydrodynamic Jets

By: Jin Matsumoto



From: Astrophysical Big Bang Laboratory, RIKEN, Wako, Saitama, Japan

Where: Seminari del departament d'Astronomia i Astrofisica

Date: Dijous 06 febrer 2014, 14:45

Abstract:

We investigate the stability of relativistic jets using
three-dimensional hydrodynamic simulations. The propagation of
relativistic flow that is continuously injected from the boundary of
computational domain into a uniform ambient medium is solved. An
intriguing finding in our study is that Rayleigh-Taylor and
Richtmyer-Meshkov type instabilities grow at the interface between the
jet and ambient medium as a result of spontaneously induced radial
oscillating motion. It is powered by in-situ energy conversion between
the thermal and bulk kinetic energies. From complementary
two-dimensional simulations of transverse structure of the jet, we
find the effective inertia ratio of the jet to the surrounding medium
determines a threshold for the onset of instabilities. The mixing
between light faster jet and slow heavier external matters due to
these instabilities causes the deceleration of the jet.
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Dr. Enric Marco
Departament d'Astronomia i Astrofísica
Facultat de Física
Universitat de València
C/  Dr. Moliner, 50
46100 Burjassot, Spain
Phone: (34)-96-354-3069
Fax:(34)-96-354-3084
enric.marco en uv.es
www.uv.es/marco
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