Simulation of astrophysical jet using the special relativistic hydrodynamics code

摘要

This paper describes a multi-dimensional hydrodynamic code which can be used for the studies of relativistic astrophysical flows. The code solves the special relativistic hydrodynamic equations as a hyperbolic system of conservation laws based on high resolution shock capturing (HRSC) scheme. Two standard tests, one of which is the relativistic blast wave tested in our previous paper [O. Dönmez, Astrophys. Space Sci. 293 (2004) 323–354], and the other is the collision of two ultra-relativistic blast waves tested in here, are presented to demonstrate that the code captures correctly and gives solution in the discontinuities, accurately.The relativistic astrophysical jet is modeled for the ultra-relativistic flow case. The dynamics of jet flowing is then determined by the ambient parameters such as densities, and velocities of the jets and the momentum impulse applied to the computational surface. We obtain solutions for the jet structure, propagation of jet during the time evolution, and variation in the Mach number on the computational domain at a fixed time.