Modeling flow pattern transitions for upward gas-liquid flow in vertical concentric and eccentric annuliModeling flow pattern transitions for upward gas-liquid flow in vertical concentric and eccentric annuli Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2015-10-291989enFlow patterns were investigated in vertical upward gas-liquid flow in a concentric and an eccentric annulus (eccentricity 50%). A new method for flow pattern identification is proposed based on probability density function analysis of conductance probe signals. Flow pattern maps have been constructed and mathematical models are proposed which predict the flow pattern transitions.Δημοσίευση σε επιστημονικό περιοδικό http://creativecommons.org/licenses/by/4.0/International Journal of Multiphase Flow215173-191 Kelesidis Vasilis Κελεσιδης Βασιλειος Dukler A.E. Elsevier gas-liquid flow annulus flow patterns