Results 31 to 40 of about 796,731 (290)
Bulk Viscous Cosmology: Unified Dark Matter
Advances in Astronomy, 2011 The bulk viscosity is introduced to model the current observational cosmos and the unified dark matter (dark matter and dark energy). The viscous unified model assumes that the universe is filled with a single nonperfect fluid with a bulk viscosity.
Xu Dou, Xin-He Meng
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Thermomechanical Variational Principles for Dissipative Materials with Application to Strain Localization in Bulk Metallic Glasses [PDF]
, 2004 This thesis is concerned with variational principles for general coupled thermomechanical problems in dissipative materials including finite elastic and plastic deformation, non-Newtonian viscosity, rate sensitivity, arbitrary flow and hardening rule, as
Yang, Qiang
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Effect of the GUP on the entropy, speed of sound, and bulk to shear viscosity ratio of an ideal QGP
Nuclear Physics B, 2018 In this work we compute the entropy density, speed of sound, and the resulting impact on the bulk viscosity to shear viscosity ratio of an ideal Quark Gluon Plasma when the effects of a generalized uncertainty principle are taken into consideration. When
Nasser Demir, Elias C. Vagenas
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Bulk and shear viscosity in Hagedorn fluid [PDF]
Annalen der Physik, 2010 AbstractAssuming that the Hagedorn fluid composed of known particles and resonances with masses m < 2 GeV obeys the first‐order theory (Eckart) of relativistic fluid, we discuss the transport properties of QCD confined phase. Based on the relativistic kinetic theory formulated under the relaxation time approximation, expressions for bulk and shear ...
Tawfik, A., Wahba, M.
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Transport properties of fluids in nanochannels: bridging nano to macro [PDF]
, 2011 This paper was presented at the 3rd Micro and Nano Flows Conference (MNF2011), which was held at the Makedonia Palace Hotel, Thessaloniki in Greece.
Sofos, F +4 more
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Bulk viscosity, interaction and the viability of phantom solutions
European Physical Journal C: Particles and Fields, 2017 We study the dynamics of a bulk viscosity model in the Eckart approach for a spatially flat Friedmann–Robertson–Walker (FRW) Universe. We have included radiation and dark energy, assumed as perfect fluids, and dark matter treated as an imperfect fluid ...
Yoelsy Leyva, Mirko Sepúlveda
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‘Understanding’ cosmological bulk viscosity [PDF]
Monthly Notices of the Royal Astronomical Society, 1996 12 pages, Latex file, to appear in ...
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Bulk viscosity in holographic Lifshitz hydrodynamics [PDF]
Journal of High Energy Physics, 2014 We compute the bulk viscosity in holographic models dual to theories with Lifshitz scaling and/or hyperscaling violation, using a generalization of the bulk viscosity formula derived in arXiv:1103.1657 from the null focusing equation. We find that only a class of models with massive vector fields are truly Lifshitz scale invariant, and have a vanishing
Hoyos, Carlos, Kim, Bom Soo, Oz, Yaron
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Viscosity-temperature relationships in the system Na2Si2O5-Na4Al2O5 [PDF]
, 1986 The viscosity-temperature relationships of five melts on the join Na2Si2O2-Na4Al2O5 (5, 10, 20, 30 and 40 mole percent Na4Al2O5) have been measured in air, at 1 atm and 1000–1350°C with a concentric cylinder viscometer.
Dingwell, Donald B.
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Universe models with negative bulk viscosity [PDF]
Astrophysics and Space Science, 2013 The concept of negative temperatures has occasionally been used in connection with quantum systems. A recent example of this sort is reported in the paper of S. Braun et al. [Science 339,52 (2013)], where an attractively interacting ensemble of ultracold atoms is investigated experimentally and found to correspond to a negative-temperature system since
Brevik, Iver Håkon, Grøn, Øyvind
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