Bianchi type-III string cosmological models with time dependent bulk viscosity

Bianchi type-III string cosmological models with bulk viscous fluid for massive string are investigated. To obtain the determinate model of the universe, we assume that the coefficient of bulk viscosity is inversely proportional to the expansion theta in the model and expansion theta in the model is proportional to the shear sigma. This leads to B = lC(n), where l and n are constants. Behaviour of the model in the presence and absence of bulk viscosity is discussed. The physical implications of the models are also discussed in detail.