TWO-DIMENSIONAL NUMERICAL STUDY FOR RAYLEIGH-TAYLOR AND RICHTMYER-MESHKOV INSTABILITIES IN RELATIVISTIC JETS
- Center for Computational Astrophysics, National Astronomical Observatory of Japan, Tokyo (Japan)
- Department of Computational Science, Graduate School of System Informatics, Kobe University, Kobe (Japan)
We study the stability of a non-rotating single-component jet using two-dimensional special relativistic hydrodynamic simulations. By assuming translational invariance along the jet axis, we exclude the destabilization effect by Kelvin-Helmholtz mode. The nonlinear evolution of the transverse structure of the jet with a normal jet velocity is highlighted. An intriguing finding in our study is that Rayleigh-Taylor and Richtmyer-Meshkov type instabilities can destroy cylindrical jet configuration as a result of spontaneously induced radial oscillating motion. This is powered by in situ energy conversion between the thermal and bulk kinetic energies. The effective inertia ratio of the jet to the surrounding medium {eta} determines a threshold for the onset of instabilities. The condition {eta} < 1 should be satisfied for the transverse structure of the jet being persisted.
- OSTI ID:
- 22118665
- Journal Information:
- Astrophysical Journal Letters, Vol. 772, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
Similar Records
Rayleigh–Taylor and Richtmyer–Meshkov instability induced flow, turbulence, and mixing. I
A buoyancy–shear–drag-based turbulence model for Rayleigh–Taylor, reshocked Richtmyer–Meshkov, and Kelvin–Helmholtz mixing
Related Subjects
COSMOLOGY AND ASTRONOMY
ASTRONOMY
ASTROPHYSICS
COMPUTERIZED SIMULATION
CYLINDRICAL CONFIGURATION
ENERGY CONVERSION
GALAXIES
HELMHOLTZ INSTABILITY
HYDRODYNAMICS
JETS
KINETIC ENERGY
NONLINEAR PROBLEMS
NUMERICAL ANALYSIS
RAYLEIGH-TAYLOR INSTABILITY
RELATIVISTIC RANGE
SHOCK WAVES
TWO-DIMENSIONAL CALCULATIONS