Turbulence and Little Rip Cosmology

Understand

A variety of conditions is considered under which the cosmic dark fluid may be able to develop a future Big Rip or Little Rip singularity.

• Both one-component and two-component models are considered.
• In the last-mentioned case we present a way in which the fluid can be decomposed into two components, one non-turbulent (ideal) and one turbulent part, obeying two different equations of state.
• For the non-turbulent part, the thermodynamical parameter, commonly called w, is assumed to be less than -1 throughout.