On numerical relativistic hydrodynamics and barotropic equations of state
arXiv:1206.5972 · doi:10.1088/0264-9381/29/15/157001
Abstract
The characteristic formulation of the relativistic hydrodynamic equations (Donat et al 1998 J. Comput. Phys. 146 58), which has been implemented in many relativistic hydro-codes that make use of Godunov-type methods, has to be slightly modified in the case of evolving barotropic flows. For a barotropic equation of state, a removable singularity appears in one of the eigenvectors. The singularity can be avoided by means of a simple renormalization which makes the system of eigenvectors well defined and complete. An alternative strategy for the particular case of barotropic flows is discussed.
arXiv comment7 pages, no figures. Accepted for publication in Class. Quantum Grav
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