Kgathi, Matome Abiel.2018-11-292018-11-291996https://hdl.handle.net/10539/26146A thesis submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in fulfilment of the requirements for the degree of Doctor of Philosophy. JohannesburgIn this thesis we investigate the evolution of viscous FRW cosmological models for two different constitutive equations for the bulk viscous pressure a, namely (Abbreviation abstract)enNONEQUILIBRIUM THERMODYNAMICS.VISCOSITY.COSMOLOGY--MATHEMATICAL MODELS.Thesis