ANALYTICAL SOLUTION FOR LAMINAR 2-PHASE FLOW IN A FULLY ECCENTRIC CORE-ANNULAR CONFIGURATION

Fully eccentric and concentric core annular flows represent two extrem es which are of practical interest with regard to the performance of c ore flows. The fully eccentric configuration, which is obviously the p roblematic one, has been tackled herein by introducing a unipolar coor dinate system, since the bipolar coordinate system fails to describe t he flow field for this extreme. The analytical solution obtained yield s the velocity profiles, wall and interfacial shear stresses and the r esulting insitu holdup and pressure drop. The determination of the flo w characteristics for fully eccentric flows is important as a bound to evaluate the effect of the core eccentricity in annular flows and as a complementary information to previous solutions of stratified flows with curved interface.