Relativistic Hydrodynamics and other topics in Numerical Relativity
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Equation of State in Numerical Relativistic Hydrodynamics
Relativistic temperature of gas raises the issue of the equation of state (EoS) in relativistic hydrodynamics. We study the EoS for numerical relativistic hydrodynamics, and propose a new EoS that is simple and yet approximates very closely the EoS of the single-component perfect gas in relativistic regime. We also discuss the calculation of primitive variables from conservative ones for the Eo...
متن کاملThe Breakout of Relativistic Jets from Massive Wolf-rayet Stars
New twoand three-dimensional calculations are presented of relativistic jet propagation and break out in massive Wolf-Rayet stars. Such jets are thought responsible for gamma-ray bursts. As it erupts, the highly relativistic jet core (3 to 5 degrees) is surrounded by a cocoon of less energetic, but still moderately relativistic ejecta (Γ ∼ 15) that expands and becomes visible at larger polar an...
متن کاملA ug 1 99 8 A “ horizon adapted ” approach to the study of relativistic accretion flows onto rotating black holes
We present a new geometrical approach to the study of accretion flows onto rotating black holes. Instead of Boyer-Lindquist coordinates, the standard choice in all existing numerical simulations in the literature, we employ the simplest example of a horizon adapted coordinate system, the Kerr-Schild coordinates. This choice eliminates unphysical divergent behavior at the event horizon. Computat...
متن کاملTHE PROPAGATION AND ERUPTION OF RELATIVISTIC JETS FROM THE STELLAR PROGENITORS OF GRBs
New twoand three-dimensional calculations are presented of relativistic jet propagation and break out in massive Wolf-Rayet stars. Such jets are thought responsible for gamma-ray bursts. As it erupts, the highly relativistic jet core (3 to 5 degrees; Γ & 100) is surrounded by a cocoon of less energetic, but still moderately relativistic ejecta (Γ ∼ 15) that expands and becomes visible at larger...
متن کاملRam: a Relativistic Adaptive Mesh Refinement Hydrodynamics Code
We have developed a new computer code, RAM, to solve the conservative equations of special relativistic hydrodynamics (SRHD) using adaptive mesh refinement (AMR) on parallel computers. We have implemented a characteristic-wise, finite difference, weighted essentially non-oscillatory (WENO) scheme using the full characteristic decomposition of the SRHD equations to achieve fifth order accuracy i...
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تاریخ انتشار 2004