Variational theory of non-perfect relativistic fluids.

Título inglés	Variational theory of non-perfect relativistic fluids.
Título español	Teoría (cálculo) variacional de fluidos no perfectamente relativistas.
Autor/es	Fernández, A. ; García, P. L.
Organización	Dep. Mat. Univ. Salamanca, Salamanca, España
Revista	0213-8743
Publicación	1999, 14 (2): 163-179, 7 Ref.
Tipo de documento	articulo
Idioma	Inglés
Resumen inglés	A basic question in General Relativity from the point of view of the general field theory is to obtain the Einstein equations coupled with the stress-energy-momentum tensor of a dissipative fluid from a variational principle. We believe that this problem, whose solution for perfect fluids is well known, has not been faced in a systematic way, maybe by the thought of a possible nonsense, for the concept of dissipation is believed to be incompatible with the essentially conservative character of the calculus of variations. In this talk, we shall deal with this topic by discussing a variational problem which generalizes in a natural way to this kind of fluids the Einstein-Taub formalism for the perfect fluids. We shall start by summarizing this formalism looking ahead to this generalization. Next, we shall show the generalization restricting ourselves, for simplicity, to relativistic fluids with just bulk viscosity. Finally, we shall see some simple examples that illustrate very well the essential points of the theory that has just been displayed.
Clasificación UNESCO	120404 ; 221214
Palabras clave español	Relatividad general ; Dinámica relativista ; Dinámica de fluidos ; Problemas variacionales
Código MathReviews	MR1758960
Código Z-Math	Zbl 0956.76098
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