Pradhan, A.Pandey, Om Prakash2012-03-122012-03-122011-07-06http://hdl.handle.net/11007/1216Conformally flat spherically symmetric cosmological models rep- resenting a charged perfect fluid as well as a bulk viscous fluid dis- tribution have been obtained. The cosmological constant Λ is found positive and is a decreasing function of time which is consistent with the recent supernovae observations. The physical and geometrical properties of the models are discussed.enCosmology; Conformally Flat UniverseSpherically Symmetric ModelsArticle