General relativistic smoothed particle hydrodynamics

Understand

We present a method for general relativistic smoothed particle hydrodynamics (GRSPH), based on an entropy-conservative form of the general relativistic hydrodynamic equations for a perfect fluid.

• We aim to replace approximate treatments of general relativity in current SPH simulations of tidal disruption events and accretion discs.
• We develop an improved shock capturing formulation that distinguishes between shock viscosity and conductivity in relativity.
• We also describe a new Hamiltonian time integration algorithm for relativistic orbital dynamics and GRSPH.