CERTAIN INVESTIGATIONS ON SOME BIANCHI TYPE-Ⅲ STRING COSMOLOGICAL MODELS WITH BULK VISCOSITY AND MAGNETIC FIELD

摘要

In this paper, we study Bianchi type-Ⅲ string cosmological model in the presence of bulk viscosity and magnetic field. To obtain an explicit solution, we consider an equation of state p = a + bλ and an assumption that the scalar of expansion is proportional to the shear scalar ∝θ , which leads to the relation between metric potentials β = a + bγ~(μ+1). The physical and geometric aspects of the model in the presence and absence of magnetic field are also discussed.