A Viscous Universe with Variable G and A

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A Viscous Universe with Variable G and A

机译：具有可变G和A的粘性宇宙

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The role of viscosity in cosmology has been studied by several authors [1-4]. The bulk viscosity associated with grand unified theory phase transition can lead to inflationary universe scenario. It was well known that in an early stage of the Universe when neutrino decoupling occurred, the matter behaves like viscous fluid [22]. The coefficient of viscosity is known to decrease as the Universe expands. Beesham [20] studied a universe consisting of a cosmological constant (Λ ~ t~(-2)) and bulk viscosity. He showed that the Berman model could be viscous model for n =1 /2 .

机译：粘度在宇宙学中的作用已由几位作者研究[1-4]。与整体统一理论相变相关的体积粘度会导致宇宙膨胀情况。众所周知，在宇宙的早期，中微子发生解耦时，该物质的行为就像粘性流体[22]。众所周知，随着宇宙的膨胀，粘度系数会降低。 Beesham [20]研究了一个由宇宙常数（Λ〜t〜（-2））和堆积粘度组成的宇宙。他证明了伯曼模型对于n = 1/2可能是粘性模型。

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《Hadronic Journal》 |2011年第1期|p.80-97|共18页
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机译：具有变量G和衰变Λ的块状粘性LRS Bianchi-I宇宙
2. Bulk viscous LRS Bianchi-I Universe with variable G and decaying Λ [J] . Anil Kumar Yadav, Anirudh Pradhan, Ajay Kumar Singh Astrophysics and Space Science . 2012,第1期

机译：具有变数G和衰减Λ的块状粘性LRS Bianchi-I宇宙
3. Bulk viscous cosmological models of universe with variable deceleration parameter in Lyra's Manifold [J] . Singh NI, Devi SR, Singh SS, Astrophysics and space science . 2009,第3a4期

机译：天琴座流形中可变减速度参数的宇宙大体积粘性宇宙学模型
4. Exact Solutions of Bulk Viscous With String Cloud Attached to Strange Quark Matter For Higher Dimensional FRW Universe in Lyra Geometry [C] . Halife ?a?lar, Sezgin Aygün Balkan Physical Union., International Conference . 2016

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6. Early Universe Thermodynamics and Evolution in Nonviscous and Viscous Strong and Electroweak Epochs: Possible Analytical Solutions [O] . Abdel Nasser Tawfik, Carsten Greiner 2021

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7. Inhomogeneous Bulk Viscous Fluid Universe with Electromagnetic Field and Variable Λ-Term [O] . Anirudh Pradhan, Ana Rai, Kanti Jotania 2008

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8. Viscous Dissipation and Mass Transfer Effects on the Unsteady Free Convective Flow of an Electrically Conducting Viscous Fluid past an Accelerated Vertical Porous Plate with Variable Suction [R] . Hossain, M. A., Khalil, F., Mandal, A. C. 1984

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A Viscous Universe with Variable G and A

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