2014/09/19 by Alejandro Aviles, Aviles, Alejandro, Jorge L. Cervantes-Cota +7
Physics and Astronomy · #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #General Physics (physics.gen-ph) #physics.flu-dyn #physics.gen-ph
paper · pdf · doi:10.48550/arxiv.1502.05661
13 pages, To be published in 'Selected Topics of Computational and Experimental Fluid Mechanics' Springer Book Series: Environmental Science and Engineering: Environmental Science
arxiv created 2014/09/19 · arxiv updated 2015/02/20
We review the hydrodynamics of the dark sector components in Cosmology. For this purpose we use the approach of Newtonian gravitational instability, and thereafter we add corrections to arrive to a full relativistic description. In Cosmology and Astrophysics, it is usual to decompose the dark sector into two species, dark matter and dark energy. We will use instead a unified approach by describing a single unified dark fluid with very simple assumptions, namely the dark fluid is barotropic and its sound speed vanishes.