42 citations · 573 across the 55 of their papers we have counts for
56 papers
Thermodynamic Interpretation of the Kompanneets-Chernov-Kantowski-Sachs Solutions
Salvador Mengual, Joan Josep Ferrando
The spatially homogeneous perfect fluid solutions by Kompanneets-Chernov-Kantowski-Sachs are interpreted as a thermodynamic perfect fluid in isentropic evolution, namely, the isent…
Dimension of the isometry group in type N vacuum solutions: an IDEAL approach
Juan Antonio Sáez, Salvador Mengual, Joan Josep Ferrando
The necessary and sufficient conditions for a type N vacuum solution (with cosmological constant) to admit a group of isometries of dimension are given in terms of the invarian…
Thermodynamics of the universes admitting isotropic radiation
Salvador Mengual, Joan Josep Ferrando, Juan Antonio Sáez
The thermodynamic interpretation of the Stephani Universes is studied in detail. The general expression of the speed of sound and of the thermodynamic schemes associated with a the…
Dimension of the isometry group in spacetimes with an invariant frame
Juan Antonio Sáez, Salvador Mengual, Joan Josep Ferrando
The necessary and sufficient conditions for a spacetime with an invariant frame to admit a group of isometries of dimension are given in terms of the connection tensor asso…
On the flow of perfect energy tensors
Juan Antonio Sáez, Salvador Mengual, Joan Josep Ferrando
The necessary and sufficient conditions are obtained for a unit time-like vector field to be the unit velocity of a divergence-free perfect fluid energy tensor. This plainly ki…
Hydrodynamic approach to the Synge gas
Salvador Mengual, Joan Josep Ferrando, Juan Antonio Sáez
The necessary and sufficient conditions for a perfect energy tensor to describe the energy evolutions of a monoatomic relativistic Synge gas are obtained. Then, a Rainich-like theo…