Bulk Viscous Cosmic Strings Coupled with Mass Less Scalar Field

We investigate Bianchi type V string cosmological models coupled with bulk viscous fluid source. Exact solutions of the Einstein field equations in the presence of massless scalar field are presented via a suitable power law assumption. The cosmological constant Λ is found to be a decreasing function of time and positive which is corroborated by results from recent supernovae Ia observations. The models obtained here are theoretically satisfactory and therefore there is a possibility that there may be less known objects in this universe which may be represented by our models obtained here and many unknown properties of this universe may be explored and unfolded in the study of these models.