Journal
PHYSICAL REVIEW C
Volume 88, Issue 2, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.88.024903
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Funding
- Polish National Science Center [DEC-2012/06/A/ST2/00390, DEC-2012/07/D/ST2/02125]
- Foundation for Polish Science
- Direct For Mathematical & Physical Scien
- Division Of Physics [1068765] Funding Source: National Science Foundation
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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 nonequilibrium 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.
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