Conformally Flat Spherically Symmetric Cosmological Models-Revisited
  Conformally flat spherically symmetric cosmological models representing a charged perfect fluid as well as a bulk viscous fluid distribution have been obtained. The cosmological constant \Lambda 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. 
Anirudh Pradhan and Om Prakash Pandey