Testing viscous and anisotropic hydrodynamics in an exactly solvable case
Abstract
We exactly solve the one-dimensional boost-invariant Boltzmann equation in the relaxation time approximation for arbitrary shear viscosity. The results are compared with the predictions of viscous and anisotropic hydrodynamics. Studying different non-equilibrium cases and comparing the exact kinetic-theory results to the second-order viscous hydrodynamics results we find that recent formulations of second-order viscous hydrodynamics agree better with the exact solution than the standard Israel-Stewart approach. Additionally, we find that, given the appropriate connection between the kinetic and anisotropic hydrodynamics relaxation times, anisotropic hydrodynamics provides a very good approximation to the exact relaxation time approximation solution.
Keywords
Cite
@article{arxiv.1305.7234,
title = {Testing viscous and anisotropic hydrodynamics in an exactly solvable case},
author = {Wojciech Florkowski and Radoslaw Ryblewski and Michael Strickland},
journal= {arXiv preprint arXiv:1305.7234},
year = {2013}
}
Comments
18 pages, 13 figures; v2 - published version