Relativistic second-order dissipative and anisotropic fluid dynamics in the relaxation-time approximation for an ideal gas of massive particles

被引：3

作者：

Ambrus, Victor E. ^{[1
]}

Molnar, Etele ^{[1
,2
]}

Rischke, Dirk H. ^{[2
,3
,4
]}

机构：

[1] West Univ Timisoara, Dept Phys, Bd Vasile Parvan 4, Timisoara 300223, Romania

[2] Univ Wroclaw, Incubator Sci Excellence, Ctr Simulat Superdense Fluids, Pl M Borna 9, PL-50204 Wroclaw, Poland

[3] Goethe Univ Frankfurt, Inst Theoret Phys, Max von Laue Str 1, D-60438 Frankfurt, Germany

[4] Helmholtz Res Acad Hesse FAIR, Campus Riedberg,Max von Laue Str 12, D-60438 Frankfurt, Germany

来源：

PHYSICAL REVIEW D | 2024年 / 109卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.109.076001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper, we study all transport coefficients of second-order dissipative fluid dynamics derived by relaxation-time approximation for the collision integral. These transport coefficients are computed for a classical ideal gas of massive particles, with and without taking into account the conservation of intrinsic quantum numbers. Through rigorous comparison between kinetic theory, second-order dissipative fluid dynamics, and leading-order anisotropic fluid dynamics for a (0 thorn 1)-dimensional boost-invariant flow scenario, we show that both fluid-dynamical theories describe the early far-from-equilibrium stage of the expansion reasonably well.

引用

页数：33

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