Bianchi Type V Universe Models with Specific Expansion Anisotropy

We investigate Bianchi type V cosmological models for perfect fluid source with time varying cosmological term I >. We examine the possibility of cosmological models assuming the expansion anisotropy (the ratio sigma/theta of the shear scalar sigma to the volume expansion theta) to be a function of average scale factor R. The resulting models begin with initial anisotropy and approach isotropy at late times. Our models present an initial epoch with decelerating expansion followed by late time acceleration consistent with observations.