Numerical viscosity in hydrodynamics simulations in general relativity

Details Numerical viscosity in hydrodynamics simulations in general relativity Numerical viscosity in hydrodynamics simulations in general relativity

2009-12-09

arxiv.org/abs/0912.1774v2

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Accepted for publication in Class. Quantum Grav. 15 pages, 3 figures

Scientific paper

We present an alternative method to estimate the numerical viscosity in simulations of astrophysical objects, which is based in the damping of fluid oscillations. We apply the method to general relativistic hydrodynamic simulations using a spherical coordinates. We perform 1D-spherical and 2D- axisymmetric simulations of radial oscillations in spherical systems. We calibrate first the method with simulations with added bulk viscosity and study the differences between different numerical schemes. We apply the method to radial oscillations of neutron stars and we conclude that the main source of numerical viscosity in this case is the surface of the star. We expect that this method could be useful to compute the resolution requirements and limitations of the numerical simulations in different astrophysical scenarios in the future.

Affiliated with

Also associated with

No associations

Rating

Numerical viscosity in hydrodynamics simulations in general relativity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Numerical viscosity in hydrodynamics simulations in general relativity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Numerical viscosity in hydrodynamics simulations in general relativity will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-276352