Perfect fluid with shear viscosity and spacetime evolution

被引：2

作者：

Cho, Inyong ^{[1
]}

Shaikh, Rajibul ^{[1
]}

机构：

[1] Seoul Natl Univ Sci & Technol, Sch Nat Sci, Inst Convergence Fundamental Studies, Coll Liberal Arts, Seoul 01811, South Korea

来源：

CHINESE JOURNAL OF PHYSICS | 2024年 / 87卷

基金：

新加坡国家研究基金会;

关键词：

General relativity; Einstein equations; Exact solutions; Anisotropic cosmology; VISCOUS-FLUID; UNIVERSE;

D O I：

10.1016/j.cjph.2023.12.017

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate the anisotropic evolution of spacetime driven by perfect fluid with off-diagonal shear-viscosity components. We consider the simplest form of the equation of state for fluid, for which the pressure and the shear stress are proportional to the energy density individually. At late times, compared with the usual Friedmann universe, we find that the spacetime expands less rapidly as the energy density drops faster due to the transfer to the shear stress. Very interestingly, for some ranges of the equation-of-state parameters, we find that the initial big-bang singularity can be removed.

引用

页码：452 / 464

页数：13

共 50 条

[31] Rotating perfect fluid models in general relativity
Perjés, Z
ANNALEN DER PHYSIK, 2000, 9 (3-5) : 368 - 377
[32] Euler observers for the perfect fluid without vorticity
Garat, Alcides
ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND PHYSIK, 2019, 70 (04):
[33] Interaction of anisotropic dark energy fluid with perfect fluid in the presence of cosmological term Λ
Singh, S. Surendra
MODERN PHYSICS LETTERS A, 2018, 33 (15)
[34] Magnetized Stiff Fluid Tilted Universe for Perfect Fluid Distribution in General Relativity
Raj Bali
B.L. Meena
Astrophysics and Space Science, 1998, 262 : 89 - 96
[35] Magnetized stiff fluid tilted universe for perfect fluid distribution in general relativity
Bali, R
Meena, BL
ASTROPHYSICS AND SPACE SCIENCE, 1998, 262 (01) : 89 - 96
[36] Viscosity of a Suspension with a Cubic Array of Spheres in a Shear Flow
S. I. Martynov
A. O. Syromyasov
Fluid Dynamics, 2005, 40 : 503 - 513
[37] Viscosity of a Suspension with a Cubic Array of Spheres in a Shear Flow
Martynov, S. I.
Syromyasov, A. O.
FLUID DYNAMICS, 2005, 40 (04) : 503 - 513
[38] Shear-free perfect fluids with a solenoidal electric curvature
Van den Bergh, Norbert
Carminati, John
Karimian, Hamid Reza
Huf, Peter
CLASSICAL AND QUANTUM GRAVITY, 2012, 29 (10)
[39] Shear-free perfect fluids with a γ-law equation of state
Carminati, J.
GENERAL RELATIVITY AND GRAVITATION, 2015, 47 (04)
[40] Shear-free perfect fluids with a solenoidal magnetic curvature
Carminati, J.
Karimian, H. R.
Van den Bergh, N.
Vu, K. T.
CLASSICAL AND QUANTUM GRAVITY, 2009, 26 (19)

← 1 2 3 4 5 →