Tilted Bianchi Type V Bulk Viscous Cosmological Models with Varying   $\Lambda$-Term
  Conformally flat tilted Bianchi type V cosmological models in presence of a bulk viscous fluid and heat flow are investigated. The coefficient of bulk viscosity is assumed to be a power function of mass density. The cosmological constant is found to be a decreasing function of time, which is supported by results from recent type Ia supernovae observations. Some physical and geometric aspects of the models are also discussed. 
Anirudh Pradhan and S. K. Srivastav