A new and accurate code for simulating special relativistic hydrodynamics

Po-Hsun Tseng^2*, Hsi-Yu Schive^1,2,3, Tzihong Chiueh^1,2,3

¹Center for Theoretical Physics, National Taiwan University, Taipei, Taiwan
²Institute of Astrophysics, National Taiwan University, Taipei, Taiwan
³Department of Physics, National Taiwan University, Taipei, Taiwan

* Presenter:Po-Hsun Tseng, email:zengbs@gmail.com

GAMER-sr, a GPU-accelerated Adaptive-MEsh-Refinement code, has been extended to support special relativistic hydrodynamics with post-Newtonian gravity. GAMER-sr adopts general Equation of State that has the ability to accurately compute both relativistic and non-relativistic temperature and flow speed. Moreover, 4-velocity, instead of 3-velocity, is employed for computation, which greatly reduce the errors when Lorentz factor goes to infinity. To provide convincing demonstrations of the accuracy of GAMER-sr, we directly compare with other well-known codes for demanding simulations of highly relativistic jet with low temperature.

Keywords: special relativistic hydrodynamics, simulation