Physics
Scientific paper
Jul 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvd..34..343l&link_type=abstract
Physical Review D (Particles and Fields), Volume 34, Issue 2, 15 July 1986, pp.343-351
Physics
18
Exact Solutions
Scientific paper
The anisotropic-fluid interpretation of a stress-energy tensor formed from the sum of three tensors, each of which is the energy-momentum tensor of a perfect fluid or a null fluid in the special case that the fluids four-velocities are linearly dependent, is studied. The anisotropic-fluid model formed by an arbitrary number of perfect fluids and null fluids is also studied in the particular case that all the fluids' four-velocities lay on a timelike two-plane. The anisotropic-fluid interpretation of the Bondi model of self-gravitating spheres is presented. The particular case of an anisotropic-fluid model formed with three perfect fluids with a stiff equation of state, and the particular case of two null and one perfect fluid with a p=ρ equation of state, are used as sources of the Einstein equations for a cylindrically symmetric spacetime, and these last equations are solved. Also, for these particular cases the generalization for an arbitrary number of fluid components is indicated.
Alencar Paulo S. C.
Letelier Patricio S.
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