Bianchi-Type II String Cosmological Models with Bulk Viscosity

摘要

The locally rotationally symmetric Bianchi-type Ⅱ string cosmological models with bulk viscosity areobtained, where an equation of state, p = kλ, and a relation between metric potentials, R = ASn, are adopted. Thephysical features of the models are also discussed. In special cases the model reduces to the string models withoutviscosity that was previously given in the literatures.