The two-fluid Taylor vortex flow in coaxial cylinders with a stationary outer cylinder and a rotating inner cylinder has potential advantages over conventional extraction equipment in chemical and bioprocessing industries. The two-phase flow behavior in the vertical annular region is in the form of homogeneous dispersion, band dispersion, or stratified flow segregated both phases conserving with individual integrity. Computational Fluid Dynamics (CFD) simulations have been performed for the annular region. The effect of physical properties such as density difference, interfacial tension and the effect of geometric parameters such as the annular gap have been studied. We have investigated the different rate transmissions using CFD as well as the flow visualization by particle image velocimetry and planar laser induced fluorescence. The flow pattern has also been measured and compared with CFD predictions. An attempt has been made to present the results of the transition in the form of a map with the Eotvos and Taylor numbers as the two coordinates.