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Perfect fluid scalar-tensor cosmologies
Physical Review D, 1994A method is investigated which enables exact solutions to be found for k=0 Friedmann cosmological models with a perfect fluid satisfying the equation of states p=(γ-1)ρ, where γ is constant and 0≤γ≤2, in scalar-tensor gravity theories with an arbitrary form for the gravitational coupling function ω(φ), which defines the theory.
, Barrow, , Mimoso
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1998
Abstract The aim of this book is to offer a direct and self-contained access to some of the new or recent results in fluid mechanics. It gives an authoritative account on the theory of the Euler equations describing a perfect incompressible fluid.
Jean-Yves Chemin +2 more
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Abstract The aim of this book is to offer a direct and self-contained access to some of the new or recent results in fluid mechanics. It gives an authoritative account on the theory of the Euler equations describing a perfect incompressible fluid.
Jean-Yves Chemin +2 more
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Physics Letters A, 1993
Abstract It is shown that most important closed Robertson-Walker-Friedmann universe models with a perfect fluid have an analytic continuation into the Euclidean region with a wormhole-type topology.
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Abstract It is shown that most important closed Robertson-Walker-Friedmann universe models with a perfect fluid have an analytic continuation into the Euclidean region with a wormhole-type topology.
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On coadjoint orbits of rotational perfect fluids
Journal of Mathematical Physics, 1992In this paper the structure of vortex coadjoint orbits pertaining to perfect fluids having smooth vorticities in R3, within the framework set up by J. Marsden and A. Weinstein [Physica D 7, 305–323 (1983)], in terms of an associated Hamiltonian Kähler manifold (the Clebsch manifold, described in terms of the so-called Clebsch variables) is investigated.
Penna, Vittorio, Spera, Mauro
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Lanczos Potential and Perfect Fluid Spacetimes
International Journal of Theoretical Physics, 2011zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Ahsan, Zafar, Bilal, Mohd
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2013
AbstractThis chapter builds the mathematical framework that is behind relativistic perfect fluids, namely those fluids for which viscous effects and heat fluxes are zero. Starting from the definition of the kinematic quantities of a perfect fluid and of the energy–momentum tensor, we explore the numerous forms assumed by the relativistic-hydrodynamics ...
Luciano Rezzolla, Olindo Zanotti
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AbstractThis chapter builds the mathematical framework that is behind relativistic perfect fluids, namely those fluids for which viscous effects and heat fluxes are zero. Starting from the definition of the kinematic quantities of a perfect fluid and of the energy–momentum tensor, we explore the numerous forms assumed by the relativistic-hydrodynamics ...
Luciano Rezzolla, Olindo Zanotti
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Perfect-fluid cosmologies with extra dimensions
Physical Review D, 1988We give an analysis of the solutions of the n-dimensional vacuum Einstein equations with a metric in the form of a direct sum of a Friedmann-Robertson-Walker (FRW) metric and a Kasner-type Euclidean metric. The solutions are interpreted as four-dimensional perfect-fluid cosmological FRW models, using the simple ansatz proposed by Ib\'an\ifmmode \tilde{}
, Gleiser, , Diaz
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Annals of Physics, 1972
Abstract A simple model of gyroscopic fluid behavior in two dimensions, for fluids with internal angular momentum, is developed in general and is then applied to a guiding-center plasma with finite-orbit corrections. Emphasis is placed on problems of wave propagation and stability, and on certain questions of symmetry associated with the property of ...
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Abstract A simple model of gyroscopic fluid behavior in two dimensions, for fluids with internal angular momentum, is developed in general and is then applied to a guiding-center plasma with finite-orbit corrections. Emphasis is placed on problems of wave propagation and stability, and on certain questions of symmetry associated with the property of ...
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Projective symmetry in perfect fluid spacetimes
Classical and Quantum Gravity, 2002Summary: Following a study of projective symmetry in Friedmann-Robertson-Walker models in \textit{G. S. Hall} [Classical Quantum Gravity 17, 4637-4644 (2000; Zbl 0988.83015)], it is shown (theorem 2) that the only conformally flat, perfect fluid spacetimes admitting such symmetry are, essentially, (locally) of the Friedmann-Robertson-Walker type.
Hall, G. S., Patel, M. T.
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2014
In the first chapter we introduced the perfect fluid as a fluid that does not conduct heat and for which the fluid elements interact only through pressure.
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In the first chapter we introduced the perfect fluid as a fluid that does not conduct heat and for which the fluid elements interact only through pressure.
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