In this paper we study the evolution of the dark energy parameter within the scope of a
spatially homogeneous and isotropic FRW universe filled with barotropic fluid and dark
energy. The scale factor is considered as a power law function of time which yields a
constant deceleration parameter. We consider the case when the dark energy is minimally
coupled to the perfect fluid as well as direct interaction with it. The cosmic jerk parameter in
our derived models is consistent with the recent data of astrophysical observations. It is …

In this paper, we studied the evaluation of dark energy parameter in the spatial
homogeneous and anisotropic five dimensional Kaluza-Klein space time filled with
barotropic fluid and dark energy. To solve the Einstein field equation by considering a
variable deceleration parameter here we consider two cases; first, when these fluids are
assumed to be not interacting each other and second, when they interact with each other.
We have discussed the physical and geometrical importance of the two fluid scenario …