Universe consisting of diffusive dark fluids: thermodynamics and stability analysis

Subhayan, Maity,; Bhandari, Pritikana; Chakraborty, Subenoy

doi:10.1140/epjc/s10052-019-6603-0

Cited by 11 publications

(9 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Only complex scalar field following the restrictions may be the suitable candidate for thermodynamically stable Universe. Also the dark energy (ω < 0) with constant equation of state will not be thermodynamically stable in perturbed universe and this result agrees with previous works on stability criteria of cosmic fluid [31,32].…”

Section: Discussionsupporting

confidence: 92%

See 1 more Smart Citation

Non-equilibrium thermodynamics in the non-canonical scalar field perturbed space-time : Stability analysis

Subhayan¹

2022

Preprint

Self Cite

View full text Add to dashboard Cite

The space-time of the Universe has been perturbed under a scalar field φ considering the minimum coupling between φ and the background metric. The solutions of Einstein field equations have been obtained under perturbed geometry and the corresponding conservation equation shows the non-equilibrium thermodynamic prescription of the cosmic fluid.Following the stability criteria of the cosmic fluid along with the laws of thermodynamics, some constraints have been imposed on the choice of φ.

show abstract

Section: Discussionsupporting

confidence: 92%

“…Within an isolated system which undergoes thermodynamic work done due to the continuous expansion of volume, a stable fluid must possess the positive values of all these thermodynamic derivatives i.e. [31,32]…”

Section: Emergence Of Cosmic Space and Entropy Correction 2nd Lawmentioning

confidence: 99%

Non-equilibrium thermodynamics in the non-canonical scalar field perturbed space-time : Stability analysis

Subhayan¹

2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…The elite strategy is to keep the excellent individuals in the parent generation to enter the child generation directly, so as to prevent the loss of Pareto optimal solution [14]. The elite strategy selection operator optimizes the population R i composed of the parent C i , the child D i and the composite R i according to three indexes to form the new parent C i + 1.…”

Section: Methodsmentioning

confidence: 99%

Design of new clean and efficient combustion mode and thermodynamics research using NSGA-II algorithm

Shen

2020

THERM SCI

View full text Add to dashboard Cite

Original scientific paper https://doi.org/10.2298/TSCI191016004SIn order to study a new clean and efficient combustion mode, which can relieve the pressure of traditional energy and ensure low emissions, in this study, a diesel/natural gas dual fuel engine is designed by non-dominant sorting genetic algorithm (NSGA-Ⅱ), and its thermodynamic characteristics are studied. The WP10.290 Diesel engine is modified into a diesel/natural gas dual fuel engine. The emissions of harmful substances and thermal efficiency of the modified engine under different working conditions are compared. The combustion chamber structure and adaptability between combustion chamber and injection parameters are optimized by using NSGA-II algorithm and CFD software. The results show that the emission of NO x and CH 4 and the fuel consumption rate can be reduced simultaneously by using the composite combustion model compared with the original engine. When the CH 4 emission is close to zero, the fuel consumption rate decreases obviously, and NO x slightly increases. When the angle between the injection holes is 141.57, the amount of NO x in the cylinder is large. When the injection advance angle is 21.91 CA, the pressure in the cylinder is the highest, the CH 4 production is the lowest, the NO x production is higher, and the oxygen content in the combustion mixture is less. The NO x production is the lowest. diesel/natural gas dual fuel engine can ensure efficient combustion while reducing emissions. In this study, the performance of the dual fuel engine at various speeds can be further studied, which can provide theoretical support for the design of diesel/natural gas dual fuel engine.

show abstract

“…The thermodynamical aspects of FRW model of universe with dissipative phenomenon related to effective bulk viscus pressure has been investigated recently [79]. Maity et al [80] have studied the thermodynamic stability of FRW universe having a system of non-interacting diffusive fluids with variable equation of state parameter. It would be interesting to study the behaviour of energy conditions and parameters of expanding universe as par emergent law in the framework of f (R, T ) gravity with particle creation and variable chaplygin gas.…”

Section: Model-iimentioning

confidence: 99%

Variable Chaplygin gas cosmologies in f(R, T) gravity with particle creation

Hulke,

Singh,

Bishi

et al. 2019

Preprint

View full text Add to dashboard Cite

A flat FLRW cosmological model with perfect fluid comprising of variable Chaplygin gas has been studied in context of f (R, T ) gravity with particle creation. The considered scale factors describe the accelerated expansion of universe due to the effective negative pressure produced during evolution of universe. The role of particle creation pressure on the cosmological parameters have been discussed in detail. By considering well accepted values of free parameters, the late time expansion of the universe with energy conditions have also been studied. The state-finder diagnostic for the considered cases have been studied and the evolution of source function with time have suggested almost constant particle production at late times.

show abstract

Universe consisting of diffusive dark fluids: thermodynamics and stability analysis

Cited by 11 publications

References 40 publications

Non-equilibrium thermodynamics in the non-canonical scalar field perturbed space-time : Stability analysis

Non-equilibrium thermodynamics in the non-canonical scalar field perturbed space-time : Stability analysis

Design of new clean and efficient combustion mode and thermodynamics research using NSGA-II algorithm

Variable Chaplygin gas cosmologies in f(R, T) gravity with particle creation

Contact Info

Product

Resources

About