期刊
PHYSICAL REVIEW C
卷 82, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.82.044901
关键词
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资金
- US Department of Energy [DE-FG02-03ER41259]
- Helmholtz International Center
- HIC4FAIR
- NIKHEF
- CATHIE
- U.S. Department of Energy (DOE) [DE-FG02-03ER41259] Funding Source: U.S. Department of Energy (DOE)
Models of relativistic heavy-ion collisions typically involve both a hydrodynamic module to describe the high-density liquidlike phase and a Boltzmann module to simulate the low-density breakup phase, which is gaslike. Coupling the prescriptions is more complicated for viscous prescriptions if one wants to maintain continuity of the entire stress-energy tensor and currents. Derivations for the viscosity for a gas are reviewed, which then lead to expressions for changes in the phase-space occupation based on simple relaxation-time pictures of viscosity. These expressions are shown to consistently reproduce the nonequilibrium components of the stress-energy tensor. An algorithm for generating a Monte Carlo sampling of particles with which to initiate the Boltzmann calculations is also presented.
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