English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

A family of parabolic Szekeres-Szafron class II solutions in local thermalequilibrium is studied and their associated thermodynamics are obtained. Thesubfamily with the hydrodynamic behavior of a generic ideal gas (defined by theequation of state $p = k n \Theta$) results to be an inhomogeneousgeneralization of flat FLRW $\gamma$-law models. Three significativeinterpretations that follow on from the choice of three specific thermodynamicschemes are analyzed in depth. First, the generic ideal gas in local thermalequilibrium; this interpretation leads to an inhomogeneous temperature$\Theta$. Second, the thermodynamics with homogeneous temperature considered byLima and Tiomno (CQG 6 1989). And third, a new model having exactly thehomogeneous temperature of the FLRW limit. It is shown that the three modelsabove fulfill the necessary macroscopic requirements for physical reality(positivity of matter density and temperature, energy conditions andcompressibility conditions) in wide domains of the spacetime.

Thermodynamic class II Szekeres-Szafron solutions. Singular models