Keywords: accelerating universe, cosmic age, cosmological constant, cosmological parameters, dark energy, exergy flow, universe expansion, cosmology, large-scale thermal model, thermo-mathematics
A simplistic thermal model for solving the exergy flow of the universe with continuous functions of cosmological parameters
A new thermo-mathematical model of the universe presented in this paper solves the large-scale cosmological parameters as continuous functions of the cosmic age and establishes a composite correlation among them. The universe is assumed to be thermally radiating to an infinitely large thermal bath at 0 K. This model permits and enables to calculate the exergy flow from the universe, which may explain the currently accelerating rate of expansion of the universe and the preceding decelerating phase. Calculations predicted the present time Hubble constant to be 65.7km s-1 Mpc-1 and the cosmic age to be 14.9 Gyr. The same calculations showed that the expansion of the universe has been accelerating since the cosmic age of 4.4 Gyr due to a positive, time dependent cosmological number whose present magnitude is 8.8x10-36 s-2, and it is decreasing. This Model predicts that there is an exergy flow from the universe, which diminishes in the infinite size of the thermal bath.