Equations of state and transport equations in viscous cosmological models

Mohamed Zakari, David Jou

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74 Citations (Scopus)


The aim of this paper is to compare the evolution of viscous cosmological models for three different constitutive equations for the viscous pressure σ, namely: Eckart theory (σ=-ξμuμ), Maxwell-Cattaneo theory (σ+τσ=-ξμuμ), and generalized second-order Israel-Stewart theory (σ+τσ=-ξμuμ- 12ξσTρuμμ(vτTξ)). In the last case, the nonlinear terms may be interpreted as a consequence of nonlinear equations of state for absolute temperature and thermodynamic pressure. We show that the nonlinear terms of the latter equation are compatible with a viscosity-driven inflationary expansion. © 1993 The American Physical Society.
Original languageEnglish
Pages (from-to)1597-1601
JournalPhysical Review D
Publication statusPublished - 1 Jan 1993


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