Bianchi Type III String Cosmological Model with Bulk Viscosity
Wang Xing-Xiang
Abstract
Wang Xing-Xiang
Abstract
The Bianchi type III cosmological model for a cloud string with bulk viscosity are presented. To obtain a determinate model, an equation of state and a relation between metric potentials are assumed. The physical and geometric aspects of the model are also discussed. The model describes a shearing non-rotating continuously expanding universe with a big-bang start, and the relation between the coefficient of bulk viscosity and the energy density is .
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The Bianchi type III cosmological model for a cloud string with bulk viscosity are presented. To obtain a determinate model, an equation of state and a relation between metric potentials are assumed. The physical and geometric aspects of the model are also discussed. The model describes a shearing non-rotating continuously expanding universe with a big-bang start, and the relation between the coefficient of bulk viscosity and the energy density is .
Key concepts: Volume viscosity, Physics, Cosmological model, Equation of state, String (physics), Shearing (physics), Type (biology), Viscosity