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Jafar Sadeghi

Academic rank: Professor
ORCID:
Education: PhD.
ScopusId:
Faculty: Science
Address:
Phone: 9111125092

Research

Title
Thermodynamics of the Bulk Viscous Cosmological Fluid in Presence of the Particle Creation Pressure
Type
JournalPaper
Keywords
Bulk viscosity, Particle creation, Hubble expansion parameter, Energy density, Creation pressure
Year
2013
Journal International Journal of Theoretical Physics
DOI
Researchers S.Mohammad Motevalli ، Jafar Sadeghi ، B. H. Mohammadi

Abstract

In the present work, we consider FRW metric and investigate some cosmological quantities in presence of bulk viscosity and particle creation pressure. The obtained results for a viscous cosmological fluid with particle creation show that the Hubble expansion parameter, energy density, bulk viscosity pressure, creation pressure and temperature depend on the particle creation rate and increase with increasing particle creation coefficient. It is found that the bulk viscosity and particle creation pressure seem to play important roles in the evolution of the early Universe